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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
Which of the following elements outermost orbit's last electron has magnetic quantum number $m=0$ ?
  • ✓
    $Na$
  • B
    $O$
  • C
    $Cl$
  • D
    $N$
✓

Answer

Correct option: A.
$Na$
a
$m$ equals to zero corresponds to the $s$ electron, which is the last electron of the element should be an $s$ electron.

For $Na ,\, 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$

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