Question

What is the atomic number of boron $$10$$?

Answer 1

$$5$$.

Explanation:

Boron has $$5$$ protons, $$5$$ neutrons and $$5$$ electrons.

The atomic number (also known as the proton number) of Boron is $$5$$ as it has $$5$$ protons.

It has a mass number of $$10$$, as protons and neutron have a relative atomic mass of $$1$$ each, and a neutral charge, as there are equal numbers of $$+1$$ protons and $$−1$$ electrons.