Lithium and hydrogen atom are in their second excited state. Which of the following statement/s is/are correct ?

Options

A. Value of electronic angular momentum of hydrogen atom is greater than that of lithium.
B. Both hydrogen and lithium have same value of electronic angular momentum.
C. Both hydrogen atom and lithium have same energy
D. Excitation energy of hydrogen atom is less than that of lithium.

Answer

B, D

Explanation

The electronic angular momentum can be calculated by
`mvr=(nh)/(2pi)`
Thus both hydrogen and lithium have same value of electronic angular momentum .
For energy of hydrogen atom and lithium in second excited state, `E prop (-Z^2/n^2)`
Since Z for lithium is > Z for hydrogen , excitation energy of lithium will be greater than that of hydrogen.