Which subshell for chlorine contains the valence electrons?

NetherCraft 0

1s, 2s, 2p, 3s, or 3p

and explain your reasoning please!

6 Answers

  • 3s + 3p.

    Imagine them as “levels”.

    Valence here would mean almost “outside”.

    so, in this order:


    2s; 2p;

    3s; 3p

    AND, even if we have, let’s say, iodine:

    1s; 2s; 2p; 3s; 3p; 4s; 3d; 4p; 5s; 4d; 5p;

    Our valence shell is 5 – or “O”.

    So, 5s AND 5p contain the valence electrons.

    Note that the 4d DOESN’T contain any valence electrons.

    Basically just consider the ones with the highest “numbers”.

    Got it?

  • The atomic No. of chlorine is 17. Hence the electronic configuration is: 1s2, 2s2, 2p6,3s2,3p5. Therefore the valence electron is in the 3p orbital.

  • Valence electrons are the s and p of the outer most energy level.

    For chlorine it would be 3s2, 3p5 total of 7 valence electrons.

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