Question

how are the elements with variable valency named? explain with example​

Answer 1

hi pal

Transition metals nickel, copper, tin and iron exhibit variable valency. Nonmetals such as nitrogen and oxygen also show variable valency. The products formed as a result of reaction with the different valency atoms differ in their properties. For example, in the above example, ferrous oxide is nonmagnetic whereas ferric oxide has magnetic character. Similarly, hydrogen shows a valency of +2 in hydrogen peroxide and a valency of +1 in case of water; hydrogen peroxide is strongly acidic in nature, whereas water is neutral.

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