Question:

Which of the following, in the given figure, correctly represents Cl⁻ ion (Atomic number of chlorine = 17).

Answer: Verified

(b)

Explanation: The atomic number of chlorine is 17, so a neutral chlorine atom has 17 electrons with the electronic configuration 2, 8, 7. When chlorine gains one electron to complete its octet, it becomes a chloride ion (Cl⁻) with a total of 18 electrons and the configuration is 2, 8, 8. Therefore, the correct representation of Cl⁻ ion is the one which shows 2 electrons in the K-shell, 8 electrons in the L-shell, and 8 electrons in the M-shell, with the outermost shell being complete (octet).

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Which of the following, in the given figure, correctly represents Cl⁻ ion (Atomic number of chlorine = 17).

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