Atomic Structure

Front

A charged atom

Back

Ion

Front

Subatomic particles with a negative charge

Back

Electrons

Front

The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

Back

mass number

Front

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

Back

Nucleus

Front

Atoms of the same element must always have the same number of _________

Back

protons

Front

The center of an atom, containing protons and neutrons

Back

Nucleus

Front

The number of protons in the nucleus of an atom, which determines the element's identity

Back

Atomic number

Front

Particles in the nucleus of an atom that have no charge

Back

Neutrons

Front

The region around the nucleus where electrons are likely to be found

Back

Electron cloud

Front

Atoms that have the same number of protons but different numbers of neutrons

Back

Isotopes