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Table of Common Oxidation Numbers

Names and Charges of Some Positive Ions

Name

Formula and Charge

Name

Formula and Charge

Aluminum

Al3+

Lead (II), plumbous

Pb2+

Ammonium

NH4+

Lead (IV), plumbic

Pb4+

Barium

Ba2+

Lithium

Li+

Calcium

Ca2+

Magnesium

Mg2+

Chromium (II), chromous

Cr2+

Manganese (II), manganous

Mn2+

Chromium (III), chromic

Cr3+

Manganese (III), manganic

Mn3+

Chromium (VI), perchromic

Cr6+

Mercury (I), mercurous

Hg22+

Copper (I), cuprous

Cu+

Mercury (II), mercuric

Hg2+

Copper (II), cupric

Cu2+

Potassium

K+

Gold (I), aurous

Au+

Silver

Ag+

Gold (II), auric

Au2+

Sodium

Na+

Hydrogen

H+

Tin (II), stannous

Sn2+

Iron (II), ferrous

Fe2+

Tin (IV), stannic

Sn4+

Iron (III), ferric

Fe3+

Zinc

Zn2+

Names and Charges of Some Negative Ions

bromide

Br-

nitride

N3-

chloride

Cl-

oxide

O2-

fluoride

F-

sulfide

S2-

iodide

I-

 

 

Names and Charges of Some Polyatomic Ions

acetate

C2H2O2-

hypoiodate

IO-

ammonium

NH4+

iodate

IO3-

bromate

BrO3-

nitrate

NO3-

bromite

BrO2-

nitrite

NO2-

carbonate

CO32-

perchlorate

ClO4-

chlorate

Cl03-

periodate

IO4-

chlorite

Cl02-

phosphate

PO42-

cyanide

CN-

selenate

SeO42-

hydroxide

OH-

selenide

Se2-

hypobromite

BrO-

sulfate

SO42-

hypochlorite

ClO-

sulfite

SO32-

This page was last updated: 12/11/02