Question

Find the valency of
17/7N and 35/17Cl​

Answer 1

Explanation:

Valency of metals

The Number of electrons lost by a metal is known as the valency of the metal. For example:

1. One atom of sodium loses 1 electron to form a positive sodium ion (Na+), so sodium is a metal

Na → Na+ + e–

Here because an atom of sodium loses 1 electron so the valency of sodium metal is 1.

2. In the same way, an atom of magnesium loses 2 electrons so its valency is 2.

Mg → Mg2+ + 2e–

3. Aluminium atom loses 3 electrons so its valency is 3.

Al → Al3+ + 3e–

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