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Number of valence electrons in Cl– ion are:

Number of valence electrons in Cl– ion are: Correct Answer 8

Concept:

  • Valance Electrons: A valence electron is simply the total number of electrons present in the outermost shell of an atom.
  • Valency: Valency is the number of electrons an atom loses, gains or shares with other atoms in order to get a stable configuration.

For example-

Atomic Configuration of Carbon (C ) is ( 6 ) = 2,4

  • The valency of Carbon will be 4 as it needs 4 more electrons to get a stable configuration.
  • The number of valence electrons in carbon is also four as its outermost shell contains 4 electrons.

Atomic Configuration of Nitrogen N ( 7 ) = 2,5

The valency of nitrogen is 3 as it needs 3 more electrons to complete its octet but the number of valence electrons in nitrogen is 5.

Explanation:

The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a negatively charged ion (anion).

Here the number of Cl - (2,8,7) = Valance electron 7

Now, Cl- = (2,8,8) = Valance electron 8

You can understand with this composition

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