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Ammonium
NH⁴⁺
Silver
Ag⁺
Lead
Pb²⁺
Zinc
Zn ²⁺
Copper
Cu²⁺
Hydroxide
OH⁻
Nitrate
NO₃⁻
Sulfate
SO₄²⁻
Carbonate
CO₃ ²⁻
-ide
charge is group-8
-ium
charge is group number