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Q.

Valid set(s) of quantum numbers for an electron in the ground state in chromium atom is/are [Atomic number of Cr = 24]

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a

{2,1,0,+12}

b

{4,3,2,−12}

c

{3,2,0,−12}

d

{5,2,−1,+12}

answer is A, C.

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Detailed Solution

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B and D are not possible for ground state as there are no electrons in 4f and 5d subshells.

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