First slide

Bohr's atom model

Question

If the electron in an hydrogen atom jumps from an orbit with level $n_{i} = 3$ to an orbit with level $n_{f} = 2$ the emitted radiation has a wavelength given by

Easy

A

$λ = \frac{R}{6}$
B

$λ = \frac{36}{5 R}$
C

$λ = \frac{6}{R}$
D

$λ = \frac{5 R}{36}$

Solution

$\frac{1}{λ} = R [\frac{1}{2^{2}} - \frac{1}{3^{2}}] = \frac{5 R}{36} \Rightarrow λ = \frac{36}{5 R}$

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