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An Intiative by Sri Chaitanya
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.
answer is D.
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