Question

a) the valency of atom helium is ____.
b) The valency of oxygen is water is_____.
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Answer 1

Answer:

a)The Valency of helium is Zero. Helium possesses stable duplet configuration with 2 electrons on I shell . Hence its valency is zero.

b)The Valency of oxygen in Water is Two.  The total number of bonds that an atom has is called its valency. In the water molecule oxygen combines with two hydrogens and so has a valency of 2.

Answer 2

Dear friend the answer for this question is here:

a) The valency of helium is 0 ( because it is the abundant gas)

b) The valency of oxygen is water is 2.

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