First slide

Bohr's atom model

Question

Let the potential energy of a hydrogen atom in the ground state be zero. Then, its energy in the first excited state will be

Moderate

A

10.2 eV
B

13.6 eV
C

23.8 eV
D

27.2 eV

Solution

Making potential energy zero increases the value of total
energy by 1 3 .6 -(-13.6) : 27.2 eV
Now, actual energy in second orbit = -3.4 eV
Hence, new value is (-3.4 + 27.2) eV:23.8 eV

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