Chemistry - Atomic Structure Question with Solution | TestHub

ChemistryAtomic StructureMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with $n = 4$ to an energy level with $n = 2?$
[Given: Rydberg constant = $\frac{1}{912 \overset{o}{A}}$ ]

Options:

Answer:

Solution:

$\frac{1}{λ} = R_{H} Z^{2} [\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}}]$
$= \frac{1}{λ} = R_{H} × 1^{2} [\frac{1}{2^{2}} - \frac{1}{4^{2}}]$
$\Rightarrow \frac{1}{λ} = \frac{1}{912} × \frac{3}{16}$
$\Rightarrow λ = 4864 \overset{o}{A}$
$∴ λ = 486.4 nm$

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

⏱ 2mℹ️ Source: PYQ_2020

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