How are the elements with variable valency named? Explain with an… - Vidyadip

Question

How are the elements with variable valency named? Explain with an example.

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Answer

If an element exhibits two different positive valencies, then

for the lower valency, use the suffix -OUS at the end of the name of the metal
forthe higher valency, use the suffix -IC at the end of the name of the metal.

Example:

Element	Lower valency	Higher valency
Ferrum(Iron)	Ferrous ($Fe^{2+}$)	Ferric $(Fe^{3+})$

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