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Question

Define valency and valence shell.


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Solution

  1. Valency could be defined as the maximum number of electrons lost or gained by an atom in order to get a complete octet.
  2. For example- the valency of chlorine (Cl) is 1. It gains 1 electron.
  3. Valence shell is the outermost orbit of an atom containing valence electrons.
  4. For example Chlorine (Cl) has 7 electrons in its outermost shell.

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