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Full List of Polyatomic Ions, Monatomic Ions and Acids

Tips for Learning the Ions "FROM THE TABLE" These are ions that can be organized into 2 groups. 1. Their place of the periodic table suggests the charge on the ion, since the neutral atom gains or loses a predictable number of electrons in order to obtain a noble gas configuration. 2. Notice that cations keep their name (sodium ion) while anions have an "-ide" suffix (chloride ion) 3. Metals that can form more than one ion will have their positive charge denoted by a roman numeral in parenthesis…
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Ammonium
NH₄⁺
Acetate
C₂H₃O₂⁻
Carbonate
CO₃²⁻
Hydrogen carbonate (bicarbonate)
HCO₃⁻
Chromate
CrO₄²⁻
Dichromate
Cr₂O₇²⁻
Cyanide
CN⁻
Thiocyanate
SCN⁻
Hydroxide
OH⁻
Nitrate
NO₃⁻
Nitrite
NO₂⁻
Permanganate
MnO₄⁻
Phosphate
PO₄³⁻
Phosphite
PO₃³⁻
Sulfate
SO₄²⁻
Sulfite
SO₃²⁻
Hypochlorite
ClO⁻
Chlorite
ClO₂⁻
Chlorate
ClO₃⁻
Perchlorate
ClO₄⁻
Bromate
BrO₃⁻
Iodate
IO₃⁻
Oxalate
C₂O₄⁻²
Ammonia
NH₃
Carbon Dioxide
CO₂
Methane
CH₄