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bharathparasad577

Valence electrons are the electrons present  in the outermost shell s and p, or outermost energy level, of an atom.


valence electrons in each group are:-

  • In Alkali metals – Group 1 (I)=1
  • In Alkaline earth metals – Group 2 (II)=2
  • In Boron group – Group 13 (III)=3
  • In Carbon group – Group 14 (IV)=4
  • In Nitrogen group – Group 15 (V)=5
  • In Oxygen group – Group 16 (VI)=6
  • In Halogens – Group 17 (VII)=7
  • In Noble gases – Group 18 (VIII or 0)=8

Groups 3-12 (transition metals)= 2* (Here  4s shell is complete and it  cannot hold any more electrons).

Valence electrons  determine the electrical conductivity of an element. Depending on the nature of elements it can be metal, non-metal, or metalloid.

learn more about valence electron here-

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