Question

Explain the term variable valency​

Answer 1

Answer:

Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction. This is termed variable valency.

Explanation:

Answer 2

Answer:

Such elements are said to possess variable valency. For example, iron has two electrons in its outermost shell (valence shell). On donating these electrons, its valency becomes 2.