Answer:
Explanation:
An atom is electrically neutral, because the positive charge of its protons exactly balances the negative charge of its electrons. For all atoms, the atom number = number of protons = number of electrons. If the numbers differ, it is no longer an atom, but an ion.
A. I THINK BUT IM NOT COMPLETLY SURE
It is necessary so when conducting your answer or summary you have enough reason and evidence to support it
É só ler com atenção, e, se você leu o livro, vai saber de cara, boa sorte mano :)
