If the symbol for Cobalt, Co, were written as CO, what would be wrong with it ?
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When writing symbols, we need to be careful about the case of the letters in the symbol. CO means the compound Carbon Monoxide not Cobalt.
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Write the full form of IUPAC.
Name the elements represented by the following symbols :
Au, Pb, Sn, Hg.
Explain the terms 'valency' and 'variable valency'.
How are the elements with variable valency named ? Explain with an example.