JEE Main Chemistry question

**Assertion:** All the noble gases have an electronic configuration in their outermost shell. **Reason:** In the noble gases, all the energy levels which are occupied are completely filled.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is TrueCorrect

Answer: (D)

Solution

Helium is the exception: its configuration is simply , since the shell has no subshell at all — so it is false that *all* noble gases have an outer configuration. The Reason,

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Question ID VK-146061