The inner transition elements are the elements in which the added electrons go to:

(n-1) d-orbitals

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(n-2) f-orbitals

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(n-1) d-orbitals and (n-1) f-orbitals

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(n-1) d-orbitals and ns orbitals

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Solution

The correct option is C (n-2) f-orbitals
The inner transition elements are the elements in which the added electrons go to (n-2) f-orbitals. These include lanthanoids and actinoids. In lanthanoids, the added electron goes to 4f orbital and in actinoids, the added electron goes to 5f orbital.

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The element in which electrons are progressively filled in 4f - orbital are called
(a) actinoids (b) transition elements (c) Lanthanoids (d) halogens

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