Valency of hydrogen atom is:-

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-1

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+1 or -1

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Solution

The correct option is C
+1 or -1

Combining capacity of an atom of an element is called valency.

So, for hydrogen atom whose atomic number is 1 will have one electron in outermost shell (K) and hydrogen can either gain or lose an electron to have a stable electron shell, giving a valency of +1 or -1.

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Similar questions

Statement-1: An atom of valency 2 can combine with 2 other atoms of valency 1.
Statement-2: The valency of an element is the measure of its combining power with other atoms, when it forms chemical compounds or molecules.

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