Question

1. complete the equation in the table below.

number of neutrons =____ -____

Explanation:

Step1: Recall atomic structure concepts

In an atom, the mass number ($A$) is the sum of the number of protons ($p$) and neutrons ($n$), i.e., $A = p + n$.

Step2: Rearrange the formula

Rearranging the formula $A = p + n$ for $n$, we get $n=A - p$.

Answer:

Number of neutrons = mass number - number of protons