Chapter 3, Problem 28A

(a)

Interpretation Introduction

Interpretation: The atomic symbol for the isotope of carbon with $\text{7}$ neutrons needs to be determined.

Concept Introduction :

The number of protons in an atom is called the atomic number. The addition of the number of protons and neutrons, is equal to the mass number. When the numbers of neutrons are different the mass number of element is changes but atomic number remains unchanged that consider as an isotope of the element.

Answer to Problem 28A

The isotope of carbon $\text{C}$ .

Explanation of Solution

The number of protons in carbon= $\text{6}$

The number of neutrons= $\text{7}$

The mass number= number of protons + number of neutrons

  $\text{=6}\text{+7}$

  $\text{=13}$

The symbol for the isotope of carbon is $\text{C}$.

(b)

Interpretation Introduction

Interpretation: The atomic symbol for the isotope of carbon with $\text{6}$ neutrons needs to be determined.

Concept Introduction :

The number of protons in an atom is called the atomic number. The sum of the number of protons and neutrons, is equal to the mass number. When the numbers of neutrons are different the mass number of element is changes but atomic number remains unchanged that consider as a isotope of the element.

Answer to Problem 28A

The isotope of carbon $\text{C}$ .

Explanation of Solution

The number of protons in carbon= $\text{6}$

The number of neutrons= $\text{6}$

The mass number= number of protons + number of neutrons

  $\text{=6+6}$

  $\text{=12}$

The symbol for the isotope of carbon is $\text{C}$.

(c)

Interpretation Introduction

Interpretation: The atomic symbol for the isotope of z= $\text{6}$ with $\text{8}$ neutrons needs to be determined.

Concept Introduction :

The number of protons in an atom is called the atomic number. The sum of the number of protons and neutrons, is equal to the mass number. When the numbers of neutrons are different the mass number of element is changes but atomic number remains unchanged that consider as a isotope of the element.

Answer to Problem 28A

The isotope of carbon $\text{C}$ .

Explanation of Solution

The number of protons in carbon= $\text{6}$

The number of neutrons= $\text{8}$

The mass number= number of protons + number of neutrons

  $\text{=6+8}$

  $\text{=14}$

The symbol for the isotope of carbon is $\text{C}$.

(d)

Interpretation Introduction

Interpretation: The atomic symbol for the isotope of atomic number $\text{5}$ and mass number $\text{11}$ needs to be determined.

Concept Introduction :

The number of protons in an atom is called the atomic number. The sum of the number of protons and neutrons, is equal to the mass number. When the numbers of neutrons are different the mass number of element is changes but atomic number remains unchanged that consider as a isotope of the element.

Answer to Problem 28A

The isotope of boron is $\text{B}{}^{\text{11}}$ .

Explanation of Solution

The number of protons = $\text{5}$

For the number of neutrons-

The mass number= number of protons + number of neutrons

Number of neutrons= mass number − number of protons

  $=\text{11-5}$

  $\text{=6}$

The isotope of boron is $\text{B}{}^{\text{11}}$ .

(e)

Interpretation Introduction

Interpretation: The atomic symbol for the isotope of number of protons $\text{5}$ and number of neutrons $\text{5}$ needs to be determined.

Concept Introduction :

The number of protons in an atom is called the atomic number. The sum of the number of protons and neutrons, is equal to the mass number. When the numbers of neutrons are different the mass number of element is changes but atomic number remains unchanged that consider as a isotope of the element.

Answer to Problem 28A

The isotope of boron is $\text{B}{}^{\text{10}}$ .

Explanation of Solution

The number of protons = $\text{5}$

The number of neutrons= $\text{5}$

The mass number= number of protons + number of neutrons

  $\text{=5+5}$

  $=\text{10}$

The isotope of boron is $\text{B}{}^{\text{10}}$ .

(f)

Interpretation Introduction

Interpretation: The atomic symbol for the isotope of boron with mass number $\text{10}$ needs to be determined.

Concept Introduction :

The number of protons in an atom is called the atomic number. The sum of the number of protons and neutrons, is equal to the mass number. When the numbers of neutrons are different the mass number of element is changes but atomic number remains unchanged that consider as a isotope of the element.

Answer to Problem 28A

The isotope of boron is $\text{B}{}^{\text{10}}$ .

Explanation of Solution

The number of protons = $\text{5}$

For the number of neutrons-

The mass number= number of protons + number of neutrons

Number of neutrons= mass number − number of protons

  $=\text{10-5}$

  $\text{=5}$

The isotope of boron is $\text{B}{}^{\text{10}}$ .