Question

Question #5d492

Answer 1

`5` protons, `6` neutrons

Explanation:

All atoms of boron always contain `5` protons, as that defines its atomic number (`5`).

The mass number for boron-11 is `11` (it's given to you), and recall that the number of protons plus the number of neutrons equals the mass number.

A `"^11B` atom thus contains

`11 "(mass number") - 5 "(protons)" = color(red)(6)` neutrons