Question

why do some elements exhibit variable valency?​

Answer 1

Answer:

Explanation:

This property is called as variable valency. Some elements show variable valency because of the different electronic configurations. An atom of an element can sometimes lose more electrons than are present in its valence shell i.e. loss from the penultimate shell and hence exhibit more than 1 or variable valency.

Answer 2

Answer:

Variable valency is shown by elements like Iron, mercury, and copper. Transition elements show variable valency. For example: in some cases, iron shows a valency of 2 like ferrous sulphate (FeSO4), and in some, it shows valency of 3 like ferric chloride (FeCl3). Copper shows two types of valencies 1 and 2.Some elements show variable valency because of the different electronic configurations. An atom of an element can sometimes lose more electrons than are present in its valence shell i.e. loss from the penultimate shell and hence exhibit more than 1 or variable valency. ... This is termed variable valency.

Explanation:

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