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tesy
The correct answer is c) third shell,
The atom of chlorine has only 2 electrons in its first shell, then 4 electrons in second shell and finally 8 electrons in its third.

An atom of chlorine has several valence electrons in its  third shell.

So, option C is correct one.

What is valence electron?

  • The electron/electrons present in the valence shell (outermost shell) of an atom is called valence electrons.
  • The chlorine atom have 7 valence electrons.
  • The chlorine atom has only 2 electrons in its first shell, then 8 electrons in second shell and 7 electrons in its third shell.

learn about valence electrons

https://brainly.com/question/13993867

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