Vocabulary - Atom

Front

Atom

Back

The basic particle from which all elements are made

Front

Electron

Back

A tiny, negatively-charged particle that moves around the outside of the nucleus

Front

Nucleus

Back

The center of an atom that contains protons and neutrons

Front

Proton

Back

A small, positively-charged particle that is found in the nucleus

Front

Neutron

Back

A small particle in the nucleus, with no electrical charge

Front

Atomic Number

Back

The number of protons in the nucleus

Front

Isotope

Back

Atoms of the same element that have different numbers of neutrons

Front

Mass Number

Back

The sum of protons and neutrons in the nucleus

Front

Theory

Back

An idea that has been studied, investigated, and is supported by evidence.