Prefixes and Suffixes…

Numeric prefixes (mono, di, tri, tetra, penta, hexa, hepta, octa, nona, deca)

• These are ONLY used for the following:
  • -Metal-containing acids and acid ions: the prefix ONLY goes on the hydrogen (mono is dropped)
    • Examples:
      • H₂AsO₄^– = dihydrogen arsenate ion
      • HAsO₄^2- = hydrogen arsenate ion
      • NaH₂PO₄ = sodium dihydrogen phosphate
      • NaHSeO₃ = sodium hydrogen selenite
    • Other Examples:
      • H₂AsO₄^–, H₂PO₄^–, HAsO₄^2-, HCO₃^–, HPO₄^2-, HSeO₃^–, HSeO₄^–, HSO₃^–, HSO₄^–, HTeO₃^–, HTeO₄^–, Na₂HAsO₄, Na₂HPO₄, NaH₂AsO₄, NaH₂PO₄, NaHCO₃, NaHSeO₃, NaHSeO₄, NaHSO₃, NaHSO₄, NaHTeO₃, NaHTeO₄, CaHAsO₄, CaHPO₄
    • Related Topics: Acids – Neutral w/ Metal – Oxygen, Acids – Ions – Oxygen
    • Worksheet: Study Aid G, I
  • -Nonmetal/nonmetal binary compounds that are NOT acids: the prefix goes on both first and second element (mono on the first element is dropped).
    • Examples:
      • CBr₄ = carbon tetrabromide
      • TeO₃ = tellurium trioxide
      • S₂F₆ = disulfur hexafluoride
    • Other Examples:
      • CBr₄, CCl₄, Cl₂O₇, ClO₂, CO, CO₂, ICl, N₂O, N₂O₄, N₂O₅, P₂O₃, P₂S₅, P₄O₁₀, PBr₅, PCl₃, S₂F₆, SeO₂, SF₆, SiS₂, SO₂, SO₃, TeO₃
    • Related Topics: NonAcids – Binary Cmpds – Nonmetal + Nonmetal
    • Worksheet: Study Aid D