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Valency

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Question

From the formula of water H₂O, work out the valencies of hydrogen and oxygen.

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Solution

Molecular formula, H₂O

Symbol of elements H O

Valency of elements 1 2

Thus, the valency of hydrogen, H is 1 and the valency of oxygen, O is 2.

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Q. Chlorine gas removes hydrogen from water

H_{2} O

giving out oxygen gas.

Q. Name the elements water is made of. What are the valencies of these elements ? Work out the chemical formula for water.

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Q. Assertion :Molecular formula of water is

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