Chemistry Classification of Elements and Periodicity Extended or Long form of Periodic Table Single Correct MCQ
Published on: August 13, 2026

What are the two radii shown as ‘a’ and ‘b’ in the figure known as?

A
a = Atomic radius, b = Molecular radius
B
a = Covalent radius, b = van der Waals’ radius
C
a = Ionic radius, b = Covalent radius
D
a = Covalent radius, b = Atomic radius

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Text Solution

Verified by Experts
The correct answer is:
B

‘a’ represents covelent radius which is the distance between the nuclei of two bonded atoms. ‘b’ represents van der waals’ radius which is the distance between nuclei of two closest molecules.

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