If the electron of the hdyrogen atom is replaced by another particle of same charge but of the double mass, then :

Options

A. radii of different shells will increase
B. energy gap between two levels will become double
C. ionization energy of the atom will be double
D. speed of new particle in a shell will be lesser than the speed of electron in the same shell

Answer

C, D

Explanation

I.E `= +(2pi^2 mz^2 e^4)/(n^2 h^2)`
When mass becomes double , the ionization energy will be double.