Common Cations

 NAME SYMBOL NAME SYMBOL NAME SYMBOL
aluminum Al+3 copper(II) CU+2 nickel Ni+3
ammonium NH+4 iron(II) Fe+2 potassium K+
barium Ba+2 iron(III) Fe+3 silver Ag+
calcium Ca+2 lead(II) Pb+2 sodium Na+
chromium(II) Cr+2 lead(IV) Pb+2 tin(II) Sn+2
chromium(III) Cr+3 lithium Li+ tin(IV) Sn+4
chromium(IV) Cr+6 magnesium Mg+2 zinc Zn+2
cobalt(II) Co+2 mercury(I) Hg+  
cobalt(III) Co+3 mercury(II) Hg+2    
copper(I) Cu+ nickel(II) Ni+2    

Common Anions

 NAME SYMBOL NAME SYMBOL NAME SYMBOL
acetate C2H3O2- hydride H- perchlorate ClO4-
bromide Br- hydrogen carbonate HCO3- permanganate MnO4-
carbonate CO3-2 hydrogen sulfate HSO4- peroxide O2-2
chlorate CIO3- hydroxide OH- phosphate PO4-3
chloride Cl- hypochlorite CIO- phosphide P-3
chlorite ClO2- iodide I- sulfate SO4-2
chromate CrO4-2 nitrate NO3- sulfide S-2
cyanide CN- nitrite NO2- sulfite SO3-2
fluoride F- oxide-2 O-2    
dichromate Cr2O7-2 nitride N-3    

Diatomic Molecules

Oxygen- O2
Chlorine- Cl2
Nitrogen- N2
Bromine- Br2
Hydrogen- H2
Iodine- I2
Fluorine- F2

Oxidation Numbers

SYMBOL  OX. # SYMBOL OX. # SYMBOL OX. #
Al +3 F -1 P -3, +3, +5
Sb -3, +3, +5 Au +1, +3 Pt +2, +4
As -3, +3, +5 H +1, -1 K +1
Ba +2 I -1, +1, +5, +7 Si +2, +4, -4
Be +2 Fe +2, +3 Ag +1
Bi +3, +5 Li +1 Na +1
Br -1, +1, +5 Pb +2, +4 Sr +2
Ca +2 Mg +2 S -2, +4, +6
C +2, +4, -4 Mn +2, +3, +4,+7 Sn +2, +4
Cl -1, +1, +3, +5, +7 Hg +1, +2 Ti +2, +3, +4
Cr +2, +3, +6 Ni +2, +3 W +6
Co +2, +3 N -3, -2, -1, +1, +2, +3, +4,+5 Zn +2
Cu +1, +2        

 

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