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The elements in which electrons are prog...

The elements in which electrons are progressively filled in 4f-orbitals are calleD:

A

actinoids

B

transition elements

C

lanthanoids

D

halogens

Text Solution

Verified by Experts

The correct Answer is:
C
The elements in which electrons are progressilvely filled in 4f-orbital are called lanthanoids. Lanthanoids consist of elements from Z = 58 (cerium) to 71 (lutetium).
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