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Assertion (A) : When the transition elem...

Assertion (A) : When the transition element ionises, the `4s`-orbital electrons are removed before the `3d`-orbital electrons.
Reason (R ) : The energy of `3d`-orbital electrons is lower than that of `4s`-orbital electrons.

A

If both Assertion (A) and (R ) are correct and Reason (R ) is the correct explanation of Assertion (A).

B

If both (A) and (R ) are correct but (R ) is not the correct explanation for (A).

C

If (A) is correct but (R ) is not correct.

D

If (A) and (R ) are correct

Text Solution

Verified by Experts

The correct Answer is:
A
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