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Ions and Cations

Introduction

Ions are divided into two groups; cations and anions.   Cations have a positive charge.   Typical cations include sodium (Na+), calcium (Ca++ = Ca2+), and magnesium (Mg++ = Mg2+ ).   Anions have a negative charge.  Typical anions include chloride (Cl-), sulfates (SO4 -- = SO42-), and bicarbonates (HCO3-).



Table of some Monatomic Cations and Anions..

CationsAnion
SymbolNameSymbolNameSymbolName
H+hydrogen ion Hg22+ mercury(I)
mercurous
H- hydride
Li+ lithium ion Hg2+ mercury(II) mercuric F- fluoride
Na+ sodium ion Fe2+ iron(II)
ferrous
Cl- chloride
K+ potassium ion Fe3+ iron(III)
ferric
Br-bromide
Rb+ rubidium ion Pb2+ lead(II)
plumbous
I- iodide
Cs+ cesium ion Be2+ beryllium ion O2-oxide
Pb4+ lead(IV)
plumbic
Sn2+ tin(II)
stannous
S2- sulfide
Mg2+magnesium ion Sn4+ tin(IV)
stannic
Se2- selenide
Ca2+ calcium ion Sr2+ strontium ion Te2-telluride
Co2+ cobalt(II)
cobaltous
Co3+ cobalt(III)
cobaltic
**
Ba2+ barium ion Cr2+ chromium(II)
chromous
**
Ag+ silver ion Cr3+ chromium(III)
chromic
N3- nitride
Ra2+ radium ion Al3+ aluminum ion **
Ni2+ nickel ion Au+ gold(I)
aurous
P3- phosphide
Zn2+ zinc ion Au3+ gold(III)
auric
As3- arsenide
Cu+ copper(I)
cuprous
Cu2+ copper(II)
cupric
**


Table of some Polyatomic Anions..

Anions
SymbolNameSymbolNameSymbolName
NO3- nitrate ClO4- perchlorate SO42-sulfate
NO2- nitrite ClO3- chlorate HSO4- hydrogen sulfate
CrO42- chromate ClO2- chlorite SO32- sulfite
Cr2O72- dichromate ClO- hypochlorite HSO3- hydrogen sulfite
CN- cyanide IO4- periodate C2O42- oxalate
MnO4- permanganate IO3-iodate HC2O4 - hydrogen oxalate
OH- hydroxide IO- hypoiodite PO43- phosphate
O22- peroxide BrO3- bromate HPO42-hydrogen phosphate
NH2-amide BrO-hypobromite PO33-phosphite
CO32- carbonate HCO3-hydrogen carbonate H2PO4-dihydrogen phosphate

Links relevant to organic chemistry..
  1. Table of common cations and ions .... Short but useful list
  2. Table of common anions and cations... Useful table -site also include lots more chemical tables
  3. Names, formulas and charges of the most common ions... Another usefull table within a very comprehensive website

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Last Updated 29/01/2013