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Structure of Atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom2 Marks
Question
Calculate the radius of Bohr’s fifth orbit for hydrogen atom.
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Answer

Radius of Bohr's $\mathrm{n}^{\text {th }}$ orbit for hydrogen atom is given by,
$r_n=(0.0529 n m) n^2$
For,
$n=5$
$r_5=(0.0529 n \mathrm{~m})(5)^2$
$r_5=1.3225 \mathrm{~nm}$

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