(a) Interpretation: The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined. Concept introduction: A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number . Atomic number is the number of protons in an atom. The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements . The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Question

(a) How many elements are found in period 4 in the periodic table? (b) How many elements are found in group 4A (or 14)?

Answer 1

Question

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

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(a) How many elements are found in period 4 in the periodic table? (b) How many elements are found in group 4A (or 14)?

v. Answer true or false. (a) Mendeleev discovered that, when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically. (b) Main-group elements are those in the columns 3A to 8A of the Periodic Table. (e) Nonmetals are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom. (d) Among the 116 known elements, there are approximately equal numbers of metals and nonmetals. (e) A horizontal row in the Periodic Table is called a group. () The Group 1A elements are called the "alkali metals." (g) The alkali metals react with water to give hydrogen gas and a metal hydroxide, MOH, where “M" is the metal. (h) The halogens are Group 7A elements. (1) The boiling points of noble gases (Group 8A elements) increase in going from top to bottom of the column.

(d) the ion with 74 electrons, 116 neutrons, and a +3 charge

Answer 2

Question

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

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Answer 3

Question

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

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Answer 4

Question

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

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Answer 5

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 6

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 7

Chapter 2, Problem 71QAP

Interpretation Introduction

(a)

Interpretation:

The element in the same period as that of tellurium but with number of protons three fewer than tellurium needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The element in group 14 which is a post-transition metal needs to be identified.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and also the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element.

From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 10

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Answer 11

Interpretation Introduction

(c)

Interpretation:

The element which is an alkali with 19 protons needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic properties. The element right to metalloid is called non- metal.

Answer 12

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 13

Interpretation Introduction

(d)

Interpretation:

The element which is present in group 15 and it is metalloid with the number of protons more than 40 needs to be determined.

Concept introduction:

A periodic table expresses the position of elements often organized in seven rows and eighteen columns, the rows are the periods and the columns are the groups. The elements are organized in increasing order of their atomic number. Atomic number is the number of protons in an atom.

The first group is named as alkali metals, the second group is known as alkaline earth metals, the groups from 3 to 12 are called as transition element and the element right to transition element is called post-transition element. From group 1 to 12, all elements are metals; some metals belong to post transition elements. The elements like boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, and astatine are called metalloids. Metalloids are elements with both metallic and non-metallic property. The element right to metalloid is called non- metal.

Answer 14

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Answer 25

Ch. 2 - Atomic Theory and Laws State in your own words the...Ch. 2 - State in your own words the law of constant...Ch. 2 - Two basic laws of chemistry are the law of...Ch. 2 - Two basic laws of chemistry are the law of...Ch. 2 - Who discovered the electron? Describe the...Ch. 2 - Who discovered the nucleus? Describe the...Ch. 2 - Selenium is widely sold as a dietary supplement....Ch. 2 - Radon is a radioactive gas that can cause lung...Ch. 2 - How do the isotopes of argon, Ar-36, Ar-38, and...Ch. 2 - Consider two isotopes Fe-54 and Fe-56. (a) Write...

Solution Summary: The author explains that a periodic table expresses the position of elements organized in seven rows and eighteen columns, the rows are periods and the columns are the groups.

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