Question

9. How can you name an element with two different valencies?​

Answer 1

Answer:

Some elements exhibit more than one valency I.e., they have variable valency. In Iron [||] sulfate or ferrous sulfate , ie., FeSO⁴ the valency of iron is two. In Iron [lll] sulfate or ferric sulfate, i.e , Fe² (SO⁴)³, the valency of iron is three...

Explanation:

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Answer 2

Answer:

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. In the formation of ferrous oxide, iron exhibits a valency of +2, whereas in ferric oxide, it has a valency of +3. This is termed variable valency.