There are two rows of inner transition elements in the peri…

Chemistry Classification of Elements and Periodicity Extended or Long form of Periodic Table Single Correct MCQ

Published on: August 14, 2026

There are two rows of inner transition elements in the periodic table each containging 14 elements. The reason for this may be

f – orbital has seven values for magnetic quantum number, hence total electrons are 14

In the periodic table there is space to accommodate 14 electrons only

Only 28 inner transition elements have been discovered till date

28 is the maximum number of elements that any block can accommodate.

Text Solution

Verified by Experts

The correct answer is:

For f – orbital,l = 3

There are 7 electrons with spin and 7 electrons with spin. Hence, total electrons are 14.

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