Chapter 3, Problem 21E

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 21E

The atomic number of hydrogen is $1$.

Explanation of Solution

Hydrogen is the first element of the periodic table. It is a non-metal. The symbol for the element, hydrogen is $\text{H}$. 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. From the periodic table the atomic number of given element hydrogen is $1$.

Conclusion

The atomic number of hydrogen is $1$.

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 21E

The atomic number of boron is $5$.

Explanation of Solution

Boron is a semi-metal. The symbol for the element, boron is $\text{B}$. 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. From the periodic table the atomic number of boron is $5$.

Conclusion

The atomic number of boron is $5$.

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 21E

The atomic number of aluminum is $13$.

Explanation of Solution

Aluminum is a metal. The symbol for the element, aluminum is $\text{Al}$. 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. From the periodic table the atomic number of aluminum is $13$.

Conclusion

The atomic number of aluminum is $13$.

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 21E

The atomic number of titanium is $22$.

Explanation of Solution

Titanium is a metal. The symbol for the element, titanium is $\text{Ti}$. 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. From the periodic table the atomic number of titanium is $22$.

Conclusion

The atomic number of titanium is $22$.

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 21E

The atomic number of arsenic is $33$.

Explanation of Solution

Arsenic is a semi-metal. The symbol for the element, arsenic is $\text{As}$. 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. From the periodic table the atomic number of arsenic is $33$.

Conclusion

The atomic number of arsenic is $33$.

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 21E

The atomic number of strontium is $38$.

Explanation of Solution

Strontium is a metal. The symbol for the element, strontium is $\text{Sr}$. 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. From the periodic table the atomic number of strontium is $38$.

Conclusion

The atomic number of strontium is $38$.

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 21E

The atomic number of tin is $50$.

Explanation of Solution

Tin is a metal. The symbol for the element, tin is $\text{Sn}$. 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. From the periodic table the atomic number of tin is $50$.

Conclusion

The atomic number of tin is $50$.

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 21E

The atomic number of bismuth is $83$.

Explanation of Solution

Bismuth is a metal. The symbol for the element, bismuth is $\text{Bi}$. 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. From the periodic table the atomic number of bismuth is $83$.

Conclusion

The atomic number of bismuth is $83$.