Multiple choice

Which group has zero valency?

  1. 1st group

  2. 8th group

  3. 2nd group

  4. 3rd group
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The extreme right elements have 8 electrons in their valence shell (except Helium which has 2, a duplet). Their valence shell being completely filled, their octet is satisfied and they do not take part in chemical reactions. Hence their valency or combining power is zero.

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