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Correct electronic configuration of Pt (atomic no. 78) (1) [Xe]4g^145d^106s^0 (2) [Xe]4f^14 5d^9 6s^1

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Correct electronic configuration of Pt (atomic no. 78)

(1) [Xe]4g145d106s0 

(2) [Xe]4f14 5d9 6s1

(3) [Xe]4f145d8 6s2

(4) [Xe]4f145d106s0

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Correct option is (2) [Xe]4f145d96s1

Pt(Z = 78) = [Xe] 4f145d96s1

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