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Uses of Lanthanides

The elements ...

Question

The elements are classified into four blocks depending on:

A

The type of orbitals that are being filled

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B

Mass of elements of group

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C

Size of atoms of element

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D

Colour of elements of group

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Solution

The correct option is A
The type of orbitals that are being filled

The elements are classified into four blocks depending on type of orbital being filled i.e., s, p, d and f blocks.

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Uses of Lanthanides

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