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Question

The valency of noble gases, in general is

A
Zero
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B
Two
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C
One
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D
Eight
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Solution

The correct option is A Zero
Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) are the elements of group 18. The noble gases have a valency of zero since the valence shell is saturated with 8 electrons (except helium which has two electrons). They rarely react with other elements and are considered to have a stable configuration.

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