Question

what is valency? write the valency of chlorine and sulphur

Answer 1

the combining power of an element especially as measured by the number of hydrogen atoms it can displace or combine with is known as its valency.
OR
the capability of an atom to gain or lose its valence electron in order to complete it's valence shell ( last shell) is known as valency.

valency of chlorine is -1
valency of sulphur is -2

Answer 2

Answer:

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Explanation:

the combining power of an element is known as a valency.

valency of chlorine is 1.

valency of sulphur is 6.