An ion that consists of 7 protons, 6 neutrons, and 10 electrons has a net charge of

-3

Explanation:

The charge of the ion is determined by the number of protons and the number of electrons.

Protons are a positive + charge.

Electrons are a negative - charge.

We have 7 protons and 10 electrons.

+7 charge

-10 charge

-10 + 7 = -3 charge

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.