An atom that gains or loses an electron has a net electric charge and is called a/n

Aproton.

Bion.

Celectron.

Dneutron. user: which sentence best describes mass movement?

Athe steady pace of air bouncing off a mountain

Bthe downhill movement of animals due to heavy snow in their normal home

Cthe movement of particles within an atom

Dthe downhill flow of soil and rock resulting from gravity