Published by:
CGP EDU Academic Team
Published on: August 13, 2026
For the electrons of oxygen atom, which of the following statements is correct?
A
for an electron is a 2s orbital is the same as 
for an electron is a 2p orbital.
B
An electron is the 2s orbital has the same energy as an electron is the 2p orbital.
C
for an electron is 1s orbital is the same as 
for an electron in a 2s orbital.
D
The two electrons present in the 2s orbital have spin quantum numbers, 
but of opposite sign.
but of opposite sign.
Text Solution
Verified by ExpertsThe correct answer is:
D
for an electron in a 2s orbital is greater than that in a 2p orbital (s orbital is more tightly bound to nucleus than p orbital).
Energy of 2s < 2p, lower the value of n + l, lower is the energy.
for an electron in 1 s orbital is greater than 
for an electron in a 2s orbital.
The two electrons present in any orbital have spin quantum numbers with opposite sign (i.e., 
)
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