Chapter SH, Problem 16.2APP

To determine

To calculate: Mass number of magnesium atom.

Answer to Problem 16.2APP

Mass number of magnesium atom is 24.

Explanation of Solution

Given:

Number of protons = $12$

Number of neutrons = $12$

Formula used:

Mass number is given by,

  $\text{Mass number = number of protons + number of neutrons}$

Calculation:

Mass number is calculated as:

  $\begin{array}{l}\text{Mass number = number of protons + number of neutrons}\\ \text{Mass number = 12 + 12}\\ \text{Mass number = 24}\end{array}$

Conclusion:

Mass number of magnesium atom is 24.