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Lanthanoids and actinoids differ from ea...

Lanthanoids and actinoids differ from each other because

A

of the presence of partially filled outermost shells

B

actinoids are radioactive in nature

C

they show common oxidation state of + 3

D

both are known as inner-transition elements

Text Solution

Verified by Experts

The correct Answer is:
B
All lanthanoids except promethium are non-radioactive whereas all actinoids are radioactive in nature.
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