Atomic Theory

Front

ion

Back

Charged particle

Front

electron

Back

Negatively charged particle

Front

neutron

Back

Neutral particle in nucleus

Front

electron cloud

Back

Region around nucleus with electrons

Front

cation

Back

Positively charged ion

Front

atom

Back

Basic unit of matter

Front

proton

Back

Positively charged particle in nucleus

Front

atomic number

Back

Number of protons in nucleus

Front

atomic mass unit (amu)

Back

Unit of mass for atoms

Front

Bohr Model

Back

Model of atom with electrons in orbits