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Q.

Correct combination/s of the valency electronic configuration and blocks

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a

$5 s^{0} 4 d^{10} \to d - b l o c k$

b

$4 f^{14} 5 d^{1} 6 s^{2} \to d - b l o c k$

c

$7 s^{2} 6 d^{2} \to f - b l o c k$

d

$4 s^{1} 3 d^{5} \to d - b l o c k$

answer is A, B, D.

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$4 f^{14} 5 d^{1} 6 s^{2} - L u \to f - b l o c k$

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Correct combination/s of the valency electronic configuration and blocks