Formula of Anion

Front

oxide ion

Back

O²⁻

Front

chloride ion

Back

Cl-

Front

bromide anion

Back

Br⁻

Front

iodide ion

Back

I⁻

Front

hydroxide ion

Back

OH⁻

Front

carbonate ion

Back

CO3²⁻

Front

sulphate ion

Back

SO42-

Front

phosphate ion

Back

PO₄³⁻

Front

manganate (VII) ion

Back

MnO4-

Front

thiosulfate ion

Back

S₂O₃²⁻