Question

Why is it when you add 4 electrons to Beryllium it becomes a neutral atom?

Answer 1

Because it takes 8 electron's to become a netural atom there fore when you add 4 electrons to Beryllium it becomes a netural atom and a stable substadnce.

Step-by-step explanation:

Answer 2

because since there are now 4 electrons(-) you can tell that it had 4 protons (+) before so -4+4 is 0 which makes it neutral. hope it helps.