Naming Compounds

1
Naming Compounds

• Compounds are given names that come from the
  names of their elements.

2
Rules for Naming Compounds

• All compounds have 2 names
• The first name of the compound comes from the
  first element in the formula
• A subscript after the first element doesnt
  affect the name

3
Rules for the second name

• Rule 1
• If the compound only has 2 elements and is a
  metal-nonmetal compound, the second name is the
  name of the second element with the ending
  changed to ide
• Examples
• Cl Chlorine becomes Chloride
• S Sulfur becomes Sulfide
• I Iodine becomes Iodide

4
Rules for the second name

• Rule 2
• If the compound has more than 2 elements, the
  second name is one of the following
• NO3 nitrate NaNO3 Sodium Nitrate
• OH hydroxide
• PO4 phosphate NaPO4 Sodium Phosphate
• CO3 carbonate CaCO3 Calcium Carbonate
• SO4 sulfate

5
Nonmetal-Nonmetal Compounds

• start with element to the left side on the
  periodic table
• add -ide to the second element
• use Greek prefixes for number of atoms mono, di,
  tri, tetra, penta, hexa, hepta, octa, nona, deca
• Example
• CO carbon monoxide
• CO2 carbon dioxide
• N2O5 dinitrogen pentoxide