they both are negative

neutrons have no charge, while electrons have a negative charge

Both are in the nucleus( center of atom)

Electrons are inside nucleus and neutrons are outside the nucleus.

Both have negative charge

Both are part of a molecule

Both make up parts of an atom

Both are in nucleus

the number of protons

the number of neutrons

the atomic mass

Fe³⁺

Fe^3-

V³⁺

V^3-

To make our lives difficult

Because atoms want fully filled valene shell (8 valence electrons)

Because atoms have the same number of protons and electrons

Because atoms gained neutrons

Cs⁺

Cs^-

Cs²⁺

Cs^2-

Kr

Kr⁺

Kr^-

Kr^2-

Se^2-

Se2+

Se^3-

Se³⁺

Ga³⁺

Ga^3-

Ga²⁺

Ga^2-

Rb^-

Rb⁺

Rb^2-

Rb²⁺