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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
How many electrons can be accommodated in a sub-shell for which $n = 3,\,l = 1$
  • A
    $8$
  • ✓
    $6$
  • C
    $18$
  • D
    $32$
✓

Answer

Correct option: B.
$6$
b
Principal quantum number $n =3-M$ shell

Azimuthal quantum number is $I = 1 - P$ subshell

$P$ subshell has $3$ orbitals. each can hold two electrons.

So, Number of orbitals present can be calculated by the formula $(2 l+1)$

Here value of $I =1,$

Hence Number of orbitals $=2 \times 1+1=3$

$3 p \rightarrow$

$\uparrow \downarrow \uparrow \downarrow \uparrow \downarrow$

The $p$ subshell has maximum of $3$ orbitals Hence total of $6\, electrons$ can fit for $n=3$ and $l=1$

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