Element Symbols & Names Cations H hydrogen H+ hydrogen ion Li lithium Li + lithium ion Na sodium (natrium) Na + sodium ion K potassium (kalium) K+ potassium ion Rb rubidium Rb + rubidium ion Cs cesium Cs + cesium ion Be beryllium Be 2+ beryllium ion Mg magnesium Mg 2+ magnesium ion Ca calcium Ca 2+ calcium ion Sr strontium Sr 2+ strontium ion Ba barium Ba 2+ barium ion Al aluminum Al 3+ aluminum ion Ag silver (argentum) Ag + silver ion Zn zinc Zn 2+ zinc ion Cd cadmium Cd 2+ cadmium ion Sc scandium Sc 3+ scandium ion Ga gallium Ga 3+ gallium ion Stock System Latin System Ti titanium Ti 3+ titanium(III) ion titanous ion Ti 4+ titanium(IV) ion titanic ion V vanadium V3+ vanadium(III) ion vanadous ion V5+ vanadium(V) ion vanadic ion Cr chromium Cr 2+ chromium(II) ion chromous ion Cr 3+ chromium(III) ion chromic ion Mn manganese Mn 2+ manganese(II) ion manganous ion Mn 3+ manganese(III) manganic ion Fe iron (ferrum) Fe 2+ iron(II) ion ferrous ion Fe 3+ iron(III) ion ferric ion Co cobalt Co 2+ cobalt(II) ion cobaltous ion Co 3+ cobalt(III) ion cobaltic ion Ni nickel Ni 2+ nickel(II) ion nickelous ion Ni 3+ nickel(III) ion nickelic ion Cu copper (cuprum) Cu + copper(I) ion cuprous ion Cu 2+ copper(II) ion cupric ion Au gold (aurum) Au + gold(I) ion aurous ion Au 3+ gold(III) ion auric ion 2+ Hg mercury (hydrargyrum) Hg 2 mercury(I) ion mercurous ion Hg 2+ mercury(II) ion mercuric ion Sn tin (stannum) Sn 2+ tin(II) ion stannous ion Sn 4+ tin(IV) ion stannic ion Pb lead (plumbum) Pb 2+ lead(II) ion plumbous ion Pb 4+ lead(IV) ion plumbic ion Sb antimony (stibium) Sb 3+ antimony(III) ion antimonous ion Sb 5+ antimony(V) ion antimonic ion Bi bismuth Bi 3+ bismuth(III) ion bismuthous ion Bi 5+ bismuth(V) ion bismuthic ion + NH 4 ammonium ion Element Symbols & Names Anions Acids H hydrogen H ¯ hydride ion F fluorine F ¯ fluoride ion HF (aq) hydrofluoric acid Cl chlorine Cl ¯ chloride ion HCl (aq) hydrochloric acid Br bromine Br ¯ bromide ion HBr (aq) hydrobromic acid I iodine I ¯ iodide ion HI (aq) hydroiodic acid O oxygen O2- oxide ion 2- S sulfur S sulfide ion H2S(aq) hydrosulfuric acid N nitrogen N3- nitride ion P phosphorus P3- phosphide ion Polyatomic Anions CN ¯ cyanide ion HCN (aq) hydrocyanic acid OH ¯ hydroxide ion 2- O2 peroxide ion NO 2¯ nitrite ion HNO 2(aq) nitrous acid NO 3¯ nitrate ion HNO 3(aq) nitric acid 2- CO 3 carbonate ion HCO 3¯ hydrogen carbonate ion H2CO 3(aq) carbonic acid 2- SO 3 sulfite ion HSO 3¯ hydrogen sulfite ion H2SO 3(aq) sulfurous acid 2- SO 4 sulfate ion HSO 4¯ hydrogen sulfate ion H2SO 4(aq) sulfuric acid 3- 2- PO 3 phosphite ion HPO 3 hydrogen phosphite ion H2PO 3¯ dihydrogen phosphite ion H3PO 3(aq) phosphorous acid 3- 2- PO 4 phosphate ion HPO 4 hydrogen phosphate ion H2PO 4¯ dihydrogen phosphate ion H3PO 4(aq) phosphoric acid ClO ¯ hypochlorite ion HClO (aq) hypochlorous acid ClO 2¯ chlorite ion HClO 2(aq) chlorous acid ClO 3¯ chlorate ion HClO 3(aq) chloric acid ClO 4¯ perchlorate ion HClO 4(aq) perchloric acid BrO ¯ hypobromite ion HBrO (aq) hypobromous acid BrO 2¯ bromite ion HBrO 2(aq) bromous acid BrO 3¯ bromate ion HBrO 3(aq) bromic acid BrO 4¯ perbromate ion HBrO 4(aq) perbromic acid IO ¯ hypoiodite ion HIO (aq) hypoiodous acid IO 2¯ iodite ion HIO 2(aq) iodous acid IO 3¯ iodate ion HIO 3(aq) iodic acid IO 4¯ periodate ion HIO 4(aq) periodic acid MnO 4¯ permanganate ion HMnO 4(aq) permanganic acid 2- CrO 4 chromate ion H2CrO 4(aq) chromic acid 2- Cr 2O7 dichromate ion H2Cr 2O7(aq) dichromic acid HCO 2¯ formate ion HCO 2H formic acid C2H3O2¯ acetate ion HC 2H3O2(aq) acetic acid Prefixes for Molecular Compounds & Hydrates 1 mono 2 di 3 tri 4 tetra 5 penta 6 hexa 7 hepta 8 octa 9 nona 10 deca Prefixes for Organic Compounds Alkanes Alkenes Alkynes 1 meth CH 4 methane 2 eth C2H6 ethane C2H4 ethene C2H2 ethyne 3 prop C3H8 propane C3H6 propene C3H4 propyne 4 but C4H10 butane C4H8 butene C4H6 butyne 5 pent C5H12 pentane C5H10 pentene C5H8 pentyne 6 hex C6H14 hexane C6H12 hexene C6H10 hexyne 7 hept C7H16 heptane C7H14 heptene C7H12 heptyne 8 oct C8H18 octane C8H16 octene C8H14 octyne 9 non C9H20 nonane C9H18 nonene C9H16 nonyne 10 dec C10 H22 decane C10 H20 decene C10 H18 decyne Alcohols Amines Carboxylic Acids CH 3OH methanol CH 3NH 2 methylamine HCO 2H methanoic acid C2H5OH ethanol C2H5NH 2 ethylamine CH 3CO 2H ethanoic acid C3H7OH propanol C3H7NH 2 propylamine C2H5CO 2H propanoic acid C4H9OH butanol C4H9NH 2 butylamine C3H7CO 2H butanoic acid C5H11 OH pentanol C5H11 NH 2 pentylamine C4H9CO 2H pentanoic acid C6H13 OH hexanol C6H13 NH 2 hexylamine C5H11 CO 2H hexanoic acid C7H15 OH heptanol C7H15 NH 2 heptylamine C6H13 CO 2H heptanoic acid C8H17 OH octanol C8H17 NH 2 octylamine C7H15 CO 2H octanoic acid C9H19 OH nonanol C9H19 NH 2 nonylamine C8H17 CO 2H nonanoic acid C10 H21 OH decanol C10 H21 NH 2 decylamine C9H19 CO 2H decanoic acid .