Chemistry - Atomic Structure Question with Solution | TestHub

ChemistryAtomic StructureMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

In an atom, two electrons revolve around the nucleus in circular orbits of radii r and 4r. The ratio of the time taken by them ${(T}_{2} : T_{1})$ to complete one revolution is

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Answer:

Solution:

$r_{n} = n^{2} \times η$
$r_{2} = 4 η$
$T_{n} = \frac{n^{3}}{Z^{2}} \times 1.5 \times 1 0^{- 16} s e c$
$T_{1} = \frac{1^{3}}{1^{2}} \times 1.5 \times 1 0^{- 16} s e c$
$T_{2} = \frac{2^{3}}{1^{2}} \times 1.5 \times 1 0^{- 16} s e c$
On dividing $T_{2}$ by $T_{1}$ we get
$\frac{T_{2}}{T_{1}} = \frac{8}{1}$
or $\frac{T_{1}}{T_{2}} = \frac{1}{8}$

Stream:NTA_ABHYASSubject:ChemistryTopic:Atomic StructureSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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