Question

Assertion :Carbon's electric configuration is $1s^{2}2s^{2}2p^2$ rather than $1s^{2}2s^{2}3s^2$.
Reason: $3s$ electrons are lower in energy than $2p$ electrons.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

${}_{6}C=1s^{2}2s^{2}2p^2$

$3s$ and $2p$ both have same energy as energy is given by $(n+l)$.