Chapter 3, Problem 22E

Interpretation Introduction

(a)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of helium is $2$.

Explanation of Solution

Helium is the second element of the periodic table. It is a non-metal. The symbol for the element, helium is $\text{He}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of helium is $2$.

Conclusion

The atomic number of helium is $2$.

Interpretation Introduction

(b)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of carbon is $6$.

Explanation of Solution

Carbon is a non-metal. The symbol for the element, carbon is $\text{C}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of carbon is $6$.

Conclusion

The atomic number of carbon is $6$.

Interpretation Introduction

(c)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of potassium is $19$.

Explanation of Solution

Potassium is a metal. The symbol for the element, potassium is $\text{K}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of potassium is $19$.

Conclusion

The atomic number of potassium is $19$.

Interpretation Introduction

(d)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of copper is $29$.

Explanation of Solution

Copper is a metal. The symbol for the element, copper is $\text{Cu}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of copper is $29$.

Conclusion

The atomic number of copper is $29$.

Interpretation Introduction

(e)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of selenium is $34$.

Explanation of Solution

Selenium is a non-metal. The symbol for the element, selenium is $\text{Se}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of selenium is $34$.

Conclusion

The atomic number of selenium is $34$.

Interpretation Introduction

(f)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of silver is $47$.

Explanation of Solution

Silver is a metal. The symbol for the element, silver is $\text{Ag}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of silver is $47$.

Conclusion

The atomic number of silver is $47$.

Interpretation Introduction

(g)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of lead is $82$.

Explanation of Solution

Lead is a metal. The symbol for the element, lead is $\text{Pb}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of lead is $82$.

Conclusion

The atomic number of lead is $82$.

Interpretation Introduction

(h)

Interpretation:

The atomic number of the given element is to be predicted from the periodic table.

Concept introduction:

The elements in the modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows in the periodic table are known as periods and the vertical columns are said to be groups. There are $7$ periods and $18$ groups in a modern periodic table.

Answer to Problem 22E

The atomic number of radon is $86$.

Explanation of Solution

Radon is a non-metal. The symbol for the element, radon is $\text{Rn}$. The atomic number helps in identification of an element. The atomic number is written as the subscript of the element in the general representation of an element. The atomic number of radon is $86$.

Conclusion

The atomic number of radon is $86$.