How are the elements having variable valency named? - Vidyadip

Question

How are the elements having variable valency named?

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Answer

If an element exhibits two different positive valencies, then the suffix “ous” is used to indicate lower valency, and the suffix “ic” is used to indicate the higher valency. Example: Iron( ), for the lower valency, the suffix “ous” is added- Ferrous ( ). For the higher valency “-ic” is added- Ferric

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