A&R - atomic model and structure — task. Chemistry CBSE Live product, Class 9 (2026-27).

Pick out the correct answer:

Assertion (A):	Bohr proposed that electrons revolve around the nucleus in fixed energy levels.
Reason (R):	Electrons can exist only in certain permitted orbits around the nucleus.

Both Assertion (A) and Reason (R) are true, and R is the correct explanation of A.
Both Assertion (A) and Reason (R) are true, but R is not the correct explanation of A.
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

Did you find an error?

5. A&R - atomic model and structure