give me the formula and valency of aluminate,chromate,aluminium,cupric
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the formula of cupric is 'cu' and valency is 2.
the formula of aluminium is 'al' and valency is 3.
the formula of chromate is 'CrO4' and valency is 2.
the formula of aluminate is 'AlO3' and valency is 3.
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