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. Fixed Charge Symbol Name Symbol Name H+ hydrogen ion H- hydride ion Li+ lithium ion F- fluoride ion Na+ sodium ion Cl- chloride ion K+ potassium ion Br- bromide ion Ag+ silver ion I- iodide ion Mg2+ magnesium ion O2- oxide ion Ca2+ calcium ion S2- sulfide ion Ba2+ barium ion N3- nitride ion Zn2+ zinc ion P3- phosphide ion Al3+ aluminum ion Bi3+ bismuth ion B. Variable Charge Symbol Systematic Name Common Name Symbol Systematic Name Common Name Cu+ copper(I) ion cuprous ion Hg22+ mercury(I) ion mercurous ion Cu2+ copper(II) ion cupric ion Hg2+ mercury(II) ion mercuric ion Fe2+ iron(II) ion ferrous ion Pb2+ lead(II) ion plumbous ion Fe3+ iron(III) ion ferric ion Pb4+ lead(IV) ion plumbic ion Sn2+ tin(II) ion stannous ion Co2+ cobalt(II) ion cobaltous ion Sn4+ tin(IV) ion stannic ion Co3+ cobalt(III) ion cobaltic ion Cr2+ chromium(II) ion chromous ion Ni2+ nickel(II) ion nickelous ion Cr3+ chromium(III) ion chromic ion Ni4+ nickel(IV) ion nickelic ion Mn2+ manganese(II) ion manganous ion Ti3+ titanium(III) ion titanous ion Mn3+ manganese(III) ion manganic ion Ti4+ titanium(IV) ion titanic ion II. Symbols and Charges for Polyatomic Ions Formula Name Formula Name NO3- nitrate ion ClO4- perchlorate ion NO2- nitrite ion ClO3- chlorate ion CrO42- chromate ion ClO2- chlorite ion Cr2O72- dichromate ion ClO- hypochlorite CN- cyanide ion MnO4- permanganate ion OH- hydroxide ion O22- peroxide ion CO32- carbonate ion HCO3- hydrogen carbonate ion (bicarbonate ion) SO42- sulfate ion HSO4- hydrogen sulfate ion (bisulfate ion) SO32- sulfite ion HSO3- hydrogen sulfite ion (bisulfite ion) C2O42- oxalate ion HC2O4- hydrogen oxalate ion (binoxalate ion) PO43- phosphate ion HPO42- hydrogen phosphate ion PO33- phosphite ion H2PO4- dihydrogen phosphate ion HS- hydrogen sulfide ion (bisulfide ion) C2H3O2- acetate ion (an alternate way to write acetate is CH3COO-) There is only one polyatomic cation, NH4+ = ammonium ion
0 0 0
Mono atomic ion symbol=Na+
sulphide ion = So3^2
carbonate ion Co3^2-
polyatomic ion = KCO3^2-
0 0 0
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