Name three non metal which valency is -1, -2, -3
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-1 = Chlorine, Bromine, Iodine. -2 = Oxide, Sulphide, Sulphate. -3 = Nitrogen, Nitride Phosphate
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-1 = Chlorine, Bromine, Iodine. -2 = Oxide, Sulphide, Sulphate. -3 = Nitrogen, Nitride Phosphate.
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