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SSSSS [86.1K]
3 years ago
10

What is the ground-state electron configuration of chlorine and the number of valence electrons in it?

Chemistry
1 answer:
SSSSS [86.1K]3 years ago
8 0

Explanation:

Chlorine is an element in group 7 on the periodic table.

  It is the second element in this group of halogens

 The element has a total of 17 electrons:

Ground state configuration  = 1s² 2s² 2p⁶ 3s² 3p⁵

Valence electrons are the outermost shell electrons;

  From the configuration: 3s² 3p⁵ is the valence shell

           Number of electrons  = 2 + 5  = 7

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