Chapter 4.3, Problem 12PP

Interpretation Introduction

(a)

Interpretation:

Number of protons and electrons in a radon atom needs to be determined.

Concept introduction:

Proton is a subatomic particle that carries a positive charge. An electron is a subatomic particle that carries a negative charge.

Answer to Problem 12PP

86 electrons and 86 protons are present in one radon atom.

Explanation of Solution

Radon is a chemical element in the periodic table. Its symbol is Rn and atomic number is 86 which is represented by Z for all the elements. Radon is a colorless, odorless, tasteless and radioactive noble gas.

$\text{Atomic number}\text{(Z)=}{\text{Number of electrons (N}}_{\text{e}}\text{)= Number of protons}{\text{(N}}_{\text{p}}\text{) }$

Therefore, there are 86 electrons and 86 protons in one atom of radon.

(b)

Interpretation Introduction

Interpretation:

Number of protons and electrons in a magnesium atom needs to be determined.

Concept introduction:

Proton is a subatomic particle that carries a positive charge. An electron is a subatomic particle that carries a negative charge.

Answer to Problem 12PP

12 electrons and 12 protons are present in one magnesium atom.

Explanation of Solution

Magnesium is a chemical element in the periodic table. Its symbol is Mg and the atomic number is 12. It is the ninth most abundant element in the universe.

$\text{Atomic number}\text{(Z)=}{\text{Number of electrons (N}}_{\text{e}}\text{)= Number of protons}{\text{(N}}_{\text{p}}\text{) }$

Therefore, there are 12 electrons and 12 protons in one atom of radon.