Atomic Theory

Front

Subatomic particles with a negative charge

Back

Electrons

Front

Subatomic particles with a positive charge

Back

protons

Front

Measure mainly of the nuclear particles: protons + neutrons

Back

Atomic Mass

Front

Value representing the number of protons in an element

Back

Atomic Number

Front

Subatomic particles that are neutral in charge

Back

Neutrons

Front

Atoms of the same element with a different number of neutrons

Back

Isotope

Front

Where are electrons likely to be found as they travel around the nucleus?

Back

Electron Cloud

Front

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

Back

Nucleus

Front

Who discovered the nucleus of the atom through the Gold Foil Experiment?

Back

Rutherford

Front

Discovered the electron within the atom

Back

Thomson