Question

what is the reason for exhibiting variable valency??​

Answer 1

Answer:

So after the removal of valency electrons, one or more electrons can be lost from the outermost shell of the core also. Hence these elements show two or more different valencies i.e. they have variable valency.

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Answer 2

Answer:

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So after the removal of valency electrons, one or more electrons can be lost from the outermost shell of the core also. Hence these elements show two or more different valencies i.e. they have variable valency.

please try to mark as brainlist ⭐⭐⭐