Question

The total number of inner transition elements present in the 7th period are .....

Answer 1

As in f orbital block elements so called inner transition it can accommodate only 14 electrons that is from - l to +l value of l for f is 3 hence from -3 to +3 we get 7 values in each can be given 2 electrons where in total we get 14 electrons.

Hence there are 14 elements in the seventh period.

14 elements in the 7th period called the actinoids.