Question

What is valency? Give valency of any three elements
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Answer 1

Answer:

The combining capacity of an atom is known as its valency.

eg One atom of nitrogen combines with three atoms of hydrogen to form ammonia gas. So, the valency of nitrogen is 3.

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Answer 2

Valency is the ability of an atom to gain or lose electrons. In short, it is the combining capacity of an atom.

1) Hydrogen's valency is (1-)

2) Helium's valency is (0)

3) Beryllium's valency is (2+)