Important Chemistry Formulas

Mass = # of protons + # of neutrons

Average atomic mass = (% abundance*atomic mass of isotope) + (% abundance*atomic mass of isotope)

Density= mass/volume (heart)

Percent error = |Measure value-accepted value/ accepted value| * 100

Half life = m₂=m₁(1/2)^(t²/t^1)

m₂= mass remaining

m₁= original mass

t₂= time

t₁= half life