Atoms

Front

A positively charged particle found in the nucleus of an atom is

Back

a proton.

Front

A negatively charged particle located outside the atom's nucleus is

Back

an electron.

Front

A subatomic particle that has no charge and that is found in the nucleus of an atom is

Back

a neutron.

Front

The center of an atom is

Back

a nucleus.

Front

An area around the center of the atom where electrons are located

Back

electron cloud

Front

Smaller particles that make up protons and neutrons

Back

quarks

Front

A _____ moves nuclei faster and faster until they have reached very high speeds.

Back

particle accelerator

Front

Greek philosopher who developed an atomistic theory of matter

Back

Democritus

Front

An English chemist and physicist who formulated the atomic theory with evidence.

Back

John Dalton

Front

Who discovered that electrons move in definite orbits around a positive nucleus?

Back

Neil Bohr