Among the following, the configuration 1s2 2s2 2p6 3s2 3p54s1 is valid for the :

  1. A

    ground state of chlorine

  2. B

    excited state of chlorine

  3. C

    excited state of argon

  4. D

    excited state of s2- ion

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    Solution:

    For argon, the excited-state electron configuration is,

    1s22s22p63s23p54s1

    Thus, the option C is correct for the given configuration.

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