(a)
Interpretation:
The element with the largest atomic radius in group 2A is to be determined.
Concept Introduction:
In periodic table elements are arranged in increasing order of their
(b)
Interpretation:
The element with the smallest atomic radius in group 2A is to be stated.
Concept Introduction:
In periodic table elements are arranged in increasing order of their atomic number, there are total 18 columns and 7 rows in periodic table, elements of each column show similar properties.
(c)
Interpretation:
The element with the largest atomic radius in 2nd period is to be stated.
Concept Introduction:
In periodic table elements are arranged in increasing order of their atomic number, there are total 18 columns and 7 rows in periodic table, elements of each column show similar properties.
(d)
Interpretation:
The element with the largest atomic radius in second period is to be stated.
Concept Introduction:
In periodic table elements are arranged in increasing order of their atomic number, there are total 18 columns and 7 rows in periodic table, elements of each column show similar properties.
(e)
Interpretation:
The element in group 7A with the largest ionization energy is to be determined.
Concept Introduction:
In periodic table elements are arranged in increasing order of their atomic number, there are total 18 columns and 7 rows in periodic table, elements of each column show similar properties.
Ionization energy is measure of how difficult it is to remove the most loosely held electron from an atom in the gaseous state, higher the difficulty in removing the atom; higher will be the ionization energy.
(f)
Interpretation:
The element in the group 7A with the smallest ionization energy is to be stated.
Concept Introduction:
In periodic table elements are arranged in increasing order of their atomic number, there are total 18 columns and 7 rows in periodic table, elements of each column show similar properties.
Ionization energy is measure of how difficult it is to remove the most loosely held electron from an atom in the gaseous state, higher the difficulty in removing the atom; higher will be the ionization energy.
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Introduction To General, Organic, And Biochemistry
- 2-89 Assume that a new element has been discovered with atomic number 117. Its chemical properties should be similar to those of astatine (At). Predict whether the new element’s ionization energy will be greater than, the same as, or smaller than that of: (a)At (b)Raarrow_forwardTo what group number does each element belong?(a) germanium(b) nitrogen(c) sulfur(d) carbon(e) boronarrow_forwardFill in the blanks:(a) The symbol and atomic number of the heaviest nonradioac-tive noble gas are __and__ .(b) The symbol and group number of the Period 5 transition ele-ment whose atoms have the fewest protons are __ and __ .(c) The elements in Group 6A(16) are sometimes called thechalcogens.The symbol and atomic number of the first metallicchalcogen are__ and __ .(d) The symbol and number of protons of the Period 4 alkalimetal atom are __and __.arrow_forward
- 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.arrow_forward(a) Are the elements calcium, barium, and radium in the same group or same period in the periodic table? (b) Are the elements rhodium, cadmium, and tin in the same group or period?arrow_forwardThe number and arrangement of electrons in an atom’s outer electron shell determine its element’s (a) atomic weight. (b) atomic number. (c) electrical properties. (d) chemical properties.arrow_forward
- Atoms of each of the following elements are essential for life. Give the group name for the following elements:(a) chlorine(b) calcium(c) sodium(d) sulfurarrow_forwardCarbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If atomic number of carbon is 6, the atomic number of silicon is (a) 7 (b) 14 (c) 24 (d) 16arrow_forwardWrite the electron configuration for each element.(a) Cl (b) Si (c) Sr (d) Oarrow_forward
- Helium is the lightest noble gas and the second most abundant element (after hydrogen) in the universe. (a) The radius of a helium atom is 3.1x10-11 m; the radius of its nucleus is 2.5x10-15 m. What fraction of the spherical atomic volume is occupied by the nucleus (V of a sphere 5 4/ 3πr3)? (b) The mass of a helium-4 atom is 6.64648x10-24 g, and each of its two electrons has a mass of 9.10939x10-28 g. What fraction of this atom’s mass is contributed by its nucleus?arrow_forward(a) Identify the number of electrons in the ground-state outer shell of atomic oxygen (atomic number 8).(b) How many electrons are in the ground-state outer shell of fluorine?arrow_forward2. (a) Determine the mass number of a nucleus whose radius is approximately equal to two-thirds the radius of 2Ra. (b) Identify the element. (c) Are any other answers possible? Explain. 88arrow_forward
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