Q.

In a hydrogen atom, find the binding energy of an electron at n = 4 state:

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a

13.6 eV

b

3.4 eV

c

1.51 eV

d

0.85 eV

answer is D.

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Detailed Solution

Binding energy is nothing but the energy required to remove an electron from its orbit which is given by the equationEn=13.6n2eV⇒E4=13.6(4)2⇒E4=0.85eV
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