Binary ionic compounds

• 2 elements

• first element does not change(cation)

• name the anion

  • has a charge

  • end it with ide

• If it is a transition element, use roman numerals

ternary ionic compounds

• 3 elements

• write cation name first

• anion is usually a polyatomic (ammonium is an exception)

• write polyatomic name

• if there is a transition element, use roman numerals

• formulas

  • write cation w/ charge

  • write anion w/ charge

  • do not change subscripts in polyatomics

    • ex: sulfate has to remain sulfate ( SO subscript 4)

Covalent molecules

• use prefixes

• first element stays the same

• second element ends with “ide”

• formulas

  • prefixes as subscripts

Hydrates

• ionic compound - dot - (prefix number) water

• write the word hydrate at the end

Acids

• acids w/o oxygen

  • use the prefix hydro_____ic acid

  formula

  • h+ anion

  • balance charges

• acids with oxygen

  • ate —> ic

  • ite —> ous

  • no hydro

Tips/ common mistakes on the quiz