Basic Atomic Concepts

Front

Proton

Back

+ charge, located in the nucleus

Front

Neutron

Back

neutral (0 charge), located in the nucleus

Front

Electron

Back

- charge, orbiting outside the nucleus, very very very very small & light compared to a proton or neutron

Front

Element

Back

determined by the number of protons (the atomic number)

Front

Ion

Back

an atom with a positive or negative charge (positive if there are LESS electrons than protons; negative if there are MORE electrons than protons)

Front

Isotope

Back

atoms with the same # of protons but different numbers of neutrons (different mass)

Front

Atomic Number

Back

# of protons; it also defines what element you have

Front

Atomic Mass Number

Back

# of protons + # of neutrons = mass number

Front

Atomic Weight (also known as average atomic mass)

Back

Weighted average of the mass of all of the isotopes

Front

Net Charge

Back

# of protons - # of electrons = charge