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STD 11 - 2. structure of atom — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 2. structure of atom4 Marks
MCQ
Total number of electrons in $“Cu”$ atom having $m_l = 0$
  • A
    $9$
  • ✓
    $13$
  • C
    $10$
  • D
    $6$
✓

Answer

Correct option: B.
$13$
b
Electronic configuration of $Cu(29) = 1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 4s^1\ 3d^{10}$

$\therefore m_l = 0$ will be $= 2 + 2 + 2 + 2 + 2 + 1 + 2 = 13$

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