STANDARDChemistry-Atomic Structure
STANDARD Chemistry Effective Nuclear Charge MCQ Question
Type: MCQ-conceptual-Medium-Class 11
For the electrons of oxygen atom, which of the following statements is correct?
A
Zₑff for an electron in a 2s orbital is the same as Zₑff for an electron in a 2p orbital.
B
An electron in the 2s orbital has the same energy as an electron in the 2p orbital.
C
Zₑff for an electron in 1s orbital is the same as Zₑff for an electron in a 2s orbital.
D
The two electrons present in the 2s orbital have spin quantum numbers, mₛ, but of opposite sign.
Correct Answer
Option D
Detailed Explanation
Zₑff for an electron in a 2s orbital is greater than that in a 2p orbital (s orbital is more tightly bound to the nucleus than p orbital).
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