Question

Why there are 14 lanthanides and only 14 antinides?

Answer 1

Answer:

the lanthanides series include elements 58 to 71 which fill their 4f sublevel progressively. the actinides are elements 89 to 103 and fill their 5f sublevel progressively.

Answer 2

Explanation:

The reason behind the same is only 14 actinides and lanthanides have been discovered till date, and there are only 14 spaces in the f sub-shell.

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