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2. structure of atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
Which electronic configuration for oxygen is correct according to Hund's rule of multiplicity
  • ✓
    $1{s^2}2{s^2}\,2p_x^22p_y^12p_z^1$
  • B
    $1{s^2}2{s^2}\,2p_x^22p_y^22p_z^0$
  • C
    $1{s^2}2{s^2}\,2p_x^32p_y^12p_z^0$
  • D
    None of these
✓

Answer

Correct option: A.
$1{s^2}2{s^2}\,2p_x^22p_y^12p_z^1$
a
(a) Hund’s rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts when each of them is singly filled.

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