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O²⁻
Oxide - oxo
O₂²⁻
Peroxide - peroxo
S²⁻
Sulphide - sulphido
P³⁻
Phosphide - phosphido
CO₃²⁻
Carbonate - carbonato
C₂O₄²⁻
Oxalate - oxalato
SO₄²⁻
Sulphate - sulphate
SO₃²⁻
Sulphite - sulphito