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Q.

If speed of electron in the ground state of hydrogen atom is 2.2×106 m/s, which of the following cannot be the speed of electron in any orbit of He+ ion?

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a

2.2×106 m/s

b

1.466×106 m/s

c

4.4×106 m/s

d

3.46×106 m/s

answer is D.

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Detailed Solution

Vn=V0znIn case of He+ ion, z = 2∴ For n=1, V1=2.2×106×21m/s=4.4×106 m/sFor n=2, V2=2.2×22×106 m/s=2.2×106 m/sFor n=3, V3=2.2×23×106 m/s=1.466×106 m/s
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