question_answer 101)

  For the electrons of oxygen atom, which of the following statements is correct? (a) \[{{Z}_{eff}}\] for an electron in a 2s orbital is the same as \[{{Z}_{eff}}\] 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) \[{{Z}_{eff}}\] for an electron in Is orbital is the same as \[{{Z}_{eff}}\]for an electron in a 2s orbital (d) The two electrons present in the 2s orbital have spin quantum numbers \[{{m}_{s}}\] but of opposite sign.

Answer:

  (d)