Question #5d492

1 Answer
May 25, 2017

Answer:

#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