First slide

Classical atomic models

Question

If in Bohr's model, for unielectronic atom, time period of revolution is represented as T_n,z where n represents shell no. and Z represents atomic number then the value of T_1,2 : T_2,1 will be

Moderate

A

8 : 1
B

1 : 8
C

1 : 1
D

1 : 32

Solution

$T \propto \frac{n^{3}}{Z^{2}}; \frac{T_{1, 2}}{T_{2, 1}} = \frac{1}{4} \times \frac{1}{8} = \frac{1}{32}$

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