Atoms Family: Atomic Numbers, Masses, and Electron Counts for Elements

Atomic Number

The number of Protons or Electrons in an atom.

Atomic Mass

The total number of Protons and Neutrons in an atom.

Oxygen

Atomic # = 8, Atomic Mass = 15.999, # of Protons = 8, # of Neutrons = 8, # of Electrons = 8.

Zinc

Atomic # = 30, Atomic Mass = 65.39, # of Protons = 30, # of Neutrons = 35, # of Electrons = 30.

Lithium

Atomic # = 3, Atomic Mass = 6.941, # of Protons = 3, # of Neutrons = 4, # of Electrons = 3.

Silicon

Atomic # = 14, Atomic Mass = 28.086, # of Protons = 14, # of Neutrons = 14, # of Electrons = 14.

Boron

Atomic # = 5, Atomic Mass = 10.81, # of Protons = 5, # of Neutrons = 6, # of Electrons = 5.

Bromine

Atomic # = 35, Atomic Mass = 79.904, # of Protons = 35, # of Neutrons = 45, # of Electrons = 35.

Sulfur

Atomic # = 16, Atomic Mass = 32.06, # of Protons = 16, # of Neutrons = 16, # of Electrons = 16.

Iodine

Atomic # = 53, Atomic Mass = 126.905.

Manganese

Atomic # = 25, Atomic Mass = 54.938, # of Protons = 25, # of Neutrons = 30, # of Electrons = 25.

Magnesium

Atomic # = 12, Atomic Mass = 24.305, # of Protons = 12, # of Neutrons = 12, # of Electrons = 12.

Argon

Atomic # = 18, Atomic Mass = 39.948, # of Protons = 18, # of Neutrons = 22, # of Electrons = 18.

Potassium

Atomic # = 19, Atomic Mass = 39.098, # of Protons = 19, # of Neutrons = 20, # of Electrons = 19.

Gold

Atomic # = 79, Atomic Mass = 196.967.

Hydrogen

Atomic # = 1, Atomic Mass = 1.008.

Fluorine

Atomic # = 9, Atomic Mass = 18.998.