Chapter SH, Problem 16.1APP

To determine

To calculate: Number of neutrons in the boron atom.

Answer to Problem 16.1APP

Number of neutrons is 6.

Explanation of Solution

Given:

Mass number = $11$

Atomic number = $5$

Formula used:

Mass number is given by,

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

Calculation:

Since number of protons is equal to atomic number, number of protons is $5$ .

Number of neutrons is calculated as:

  $\begin{array}{l}\text{Mass number = number of protons + number of neutrons}\\ \text{11 = 5 + number of neutrons}\\ \text{number of neutrons = 11}-5=6\end{array}$

Conclusion:

Number of neutrons is 6.