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Question

14 Elements after Actinium are called


A

Lanthanides

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B

Actinides

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C

D-Block Elements

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D

P-Block elements

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Solution

The correct option is B

Actinides


Lanthanides: 14 elements present after element lanthanum (La) are called lanthanides.

Actinides: 14 elements present after element actinium (Ac) are called actinides.

D-Block Elements: When differentiating electron enters the (n–1)d orbital, then elements of this class are called d-block elements.

P-Block Elements: When differentiating electron enters the p - orbital of the nth orbit, elements of this class are called p-block elements.

Hence, Option (B) is correct


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