First slide

Bohr's atom model

Question

According to Bohr atomic model, in which of the following transitions will the frequency be maximum?

Moderate

A

n = 3 to n = 2
B

n = 2 to n = 1
C

n = 5 to n = 4
D

n = 4 to n = 3

Solution

$\begin{array}{l} option 1 : f = \frac{E_{3} - E_{2}}{h} = \frac{(- 1.51) - (- 3.4)}{h} = \frac{1.89}{h} \\ option 2 : f = \frac{E_{2} - E_{1}}{h} = \frac{(- 3.4) - (- 13.6)}{h} = \frac{10.2}{h} \\ option 3 : f = \frac{E_{5} - E_{4}}{h} = \frac{(- 0.54) - (- 0.85)}{h} = \frac{0.31}{h} \\ option 4 : f = \frac{E_{4} - E_{3}}{h} = \frac{(- 0.85) - (- 1.51)}{h} = \frac{0.66}{h} \\ We can see, option 2 has maximum value. \end{array}$

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