Express your answer as a chemical formula.

Question

Express your answer as a chemical formula.

hydroxide

chromate

phosphate

cyanide

Answer 1

hydroxide

chromate

phosphate

cyanide

These are all polyatomic ions. Their formulas and charges should be MEMORIZED so that chemistry is feasible all year.

hydroxide: OH-

chromate: CrO4 2-

phosphate: PO4 3-

cyanide: CN-

Answer 2

These are all anions (groups of atoms treated as a single chemical species). The formulas and associated charges are:

Hydroxide (OH) (-1)

Chromate (CrO4) (-2)

Phosphate (PO4) (-3)

Cyanide (CN) (-1)