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The valency of helium is zero....

The valency of helium is zero.

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Helium possesses stable duplet configuration with 2 electrons on I shell . Hence its valency is zero.
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PEARSON IIT JEE FOUNDATION-ATOMIC STRUCTURE AND TRANSFORMATION OF MATTER-CONCEPT APPLICATION Level -1
  1. The number of electrons in second shell of a metal with three valence...

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  2. The valency of helium is zero.

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  3. The name of CrO(4)^(-2) radical is dichromate ion.

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  4. Rusting of iron is an example of both physical and chemical change.

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  5. Sublimation of camphor is a physical change.

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  6. The central part of the atom called nucleus accounts for the mass of a...

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  7. Both protons and neutrons possess the same magnitude of charge but op...

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  8. The maximum number of electrons in L shell is two.

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  9. An atom is electrically neutral .

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  10. In phosphide ion , the total number of electrons is equal to 12.

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  11. The symbol of cobalt is .

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  12. The mass of an electron is times that of mass of a proton.

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  13. The maximum number of electrons that can be accommodated in the outerm...

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  14. The valency of argon is .

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  15. In the formation of sodium chloride , each chlorine gains electron.

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  16. The formula of a zincate radical is .

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  17. The combining capacity of the metal which can exhibit more than one v...

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  18. Balackening of silverware is a change.

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  19. 2HOCl to2HCl+O(2) is a decomposition reaction.

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  20. Atomic number of a metal having 12 neutrons and mass number 23 is .

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