Respuesta :

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.

sillskaidon

Answer:

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.

Explanation:

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