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Question

How does silver holds the valency of 1, 2 and 3? How to find valency of other elements which have more than two valency?

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Solution

silver shows valency 1,2 and 3 because:

Sometimes, the same element may exhibit one valency in one compound and another valency in other compound. 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.

The reason behind Why they lose this extra electron is purely a matter of the specific element, what electron shell they are losing/gaining electrons in, and their relative energies to the previous/ next electron shell. Also their ability to share electrons between these shells.

-variable valency can be calculated by observing the compounds formed by that element.By looking the no of electrons take part in the reaction to form a stable compound.


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