Why do some elements show variable valency?

Asked by  | 23rd Oct, 2013, 10:44: PM

Expert Answer:

Sometimes, 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.

Answered by Hanisha Vyas | 24th Oct, 2013, 11:13: AM

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