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Question

Elements In The Same Group Have Equal Valency Comment On It


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Solution

Valency is defined as the number of electrons lose or gained by an atom to attain a noble gas configuration.

  • Elements in the same group show the same valency because they have the same number of electrons in the outermost shell i.e. Valence shell.
  • Since valency depends upon the valence electrons so they have the same valency.

Examples:

  • Valency of the first group element (alkali metal) is one.
  • The valency of a second group ( alkaline earth metal) element is two.

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