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Assertion : The 19th electron in potassi...

Assertion : The 19th electron in potassium atom enters 4s-orbital and not 3d orbital.
Reason : The energies of the orbitals can be compared with the help of (n+l) rules.

A

if both assertion and reason are correct and reason is correct explanation for assertion .

B

If both assertion and reason are correct but reason in not correct explanation for assertion.

C

If assertion is correct but reason is incorrect.

D

If both assertion and reason are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
A
Reason is the correct explanation for assertion.
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