Question

what is variable valency
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Answer 1

Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction. For example, iron combines with oxygen to form ferrous oxide as well as ferric oxide. This is termed variable valency. ...

Answer:

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Answer 2

Here is your answer …


In transition elements, an atom looses electrons from the shell next to the valence shell. In such a situation the element exhibits more than one valency. For example, iron has two electrons in its outermost shell. On donating these electrons, it’s valency becomes 2…


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