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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
If in Bohr's model, for unielectronic atom, time period of revolution is represented as $T_{n,Z}$ where $n$ represents shell no. and $Z$ represents atomic number then the value of $T_{1,2} : T_{2,1}$ will be
  • A
    $8 : 1$
  • B
    $1 : 8$
  • C
    $1: 1$
  • ✓
    $1 : 32$
✓

Answer

Correct option: D.
$1 : 32$
d
$T\, \propto \,\frac{{{n^3}}}{{{Z^2}}};\frac{{{T_{1,2}}}}{{{T_{2,1}}}} = \frac{1}{4} \times \frac{1}{8} = \frac{1}{{32}}$

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