Question

what are the variable valencies of Sulphur and phosphorus​

Answer 1

Answer:

P(Phosphorus), S(Sulphur)and other p-block elements from 3rd period onwards have variable valancy because of expanding octets. They can expand their covalency making them showing variable dominant oxidation states.

Answer 2

Answer:

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Explanation:

Elements like P(Phosphorus), S(Sulphur)and other p-block elements from 3rd period onwards have variable valancy because of expanding octets. They can expand their covalency making them showing variable dominant oxidation states.