CHEMICAL FORMULAS: Coefficient: in front of Formula small # after an atom Subscript: Subscript after ( ) multiply everything inside by that # Example: 2Ca(NO3)2 Answer: # of atoms of each substance in the formula above: 2 Ca 4 N 12 O Example: How many atoms of each substance are in the formula 3Na2SO4 ? 6 Na 3 S 12 O OXIDATION NUMBERS: Indicates the number of electrons lost or gained when a bond is formed.
CHEMICAL FORMULAS: Coefficient: in front of Formula Subscript: small # after an atom Subscript after ( ) multiply everything inside by that # Example: 2Ca(NO3)2 Answer: # of atoms of each substance in the formula above: 2 Ca 4 N 12 O Example: How many atoms of each substance are in the formula 3Na2SO4 ? 6 Na 3 S 12 O OXIDATION NUMBERS: Indicates the number of electrons lost or gained when a bond is formed.