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

1.	For the electrons of oxygen atom, which of the following statements is correct ?
Answer» `Z_("eff")` for an electron in a 2s orbital is the same as `Z_("eff")` for an electron in a 2p orbital An electron in the 2s orbital has the same ENERGY as an electron in the 2p orbital `Z_("eff")` for electron in 1s orbital is the same `Z_("eff")` for an electron in a 2s orbital The two electrons present in the 2s orbital have spin quantum number `m_(s)` but of OPPOSITE sign Solution :Electrons in 2s and 2p orbitals have DIFFERENT screening EFFECTS. Hence, their `Z_("eff")` is different. Therefore, (a) is not correct. Energy of `2s lt 2p`. Hence, (b) is not correct. For reason similar to that of (a), (c) is ALSO not correct. The two electrons in any orbital have spin quantum numbers with opposite sign. Hence, (d) is correct

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