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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
The distance between $3^{rd}$ and $2^{nd}$ Bohr's orbits in the hydrogen atom is
  • ✓
    $2.646\, \times \, 10^{-8}\, cm$
  • B
    $2.116\, \times \, 10^{-8}\, cm$
  • C
    $1.058\, \times\, 10^{-8}\, cm$
  • D
    $0.529\, \times\, 10^{-8}\, cm$
✓

Answer

Correct option: A.
$2.646\, \times \, 10^{-8}\, cm$
a
${r_3} - {r_2} = 0.529\left( {\frac{{{3^3}}}{1} - \frac{{{2^2}}}{1}} \right)$

$ = 0.529 \times 5$

$ = 2.645\,\mathop A\limits^o $

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