Fundamentholfundamenthol
JEE Advanced2024Paper 2CHEM-I
Q.

According to Bohr's model, the highest kinetic energy is associated with the electron in the

  1. A

    First orbit of H atom

  2. B

    First orbit of He

  3. C

    Second orbit of He

  4. D

    Second orbit of Li

Solution

In the Bohr model, the kinetic energy of an electron in the orbit of a hydrogen-like species is

The quantity decides the ranking. Computing each:

H atom, :

He, :

He, :

Li, :

The largest value, , corresponds to the first orbit of He.

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