Question

A certain atom has 22 protons and 19 electrons. This atom loses an electron. The net charge on the atom is now . If this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be .

Answer 1

1) p⁺ = 22; number of protons.

e⁻ = 19 - 1 = 18; number of electrons.

Net charge is +4, because atom has 4 protons more than electrons.

Proton is a subatomic particle with a positive electric charge of +1e elementary charge.

2) p⁺ = 22; number of protons.

e⁻ = 19 + 3 = 22; number of electrons.

Net charge is 0 (neutral charge), because atom has same number of protons and electrons.