MHT CET Chemistry question

For the electrons of oxygen atom, which of the following statements is correct?

(A) for an electron in a 2s orbital is the same as 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) for an electron in 1s orbital is the same as for an electron in 2s orbital
(D)The two electrons present in the 2s orbital have spin quantum numbers but of opposite signCorrect

Answer: (D)

Solution

Because of better penetration, a 2s electron has a higher and lower energy than a 2p electron, so (a) and (b) are wrong; of 1s is much

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Question ID VK-060584