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Q.

Lanthanum element with z = 57 belongs to

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a

s-block

b

p-block

c

d-block

d

f-block

answer is C.

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Detailed Solution

$57^{La} - [Xe] 5 d^{1} 6 s^{2}$ The outermost electrons enters into d-block. So La belongs to d-block.

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