1. Energy required to excite an electron in hydrogen atom to its ground state to its first excited state is 

2. According to Bohrโ€™s postulates, an electrons revolve around the nucleus in ______ orbits.

3. The angular momentum of the electron in the nth allowed orbit is;

4. The existence of positively charged nucleus was established by,

5. The angle of scattering ฮธ ,for zero value of impact parameter  is ____________.

6. The Bohrโ€™s model is applicable to which kind of atoms

7. In equation En= -13.6/๐‘›2  eV, what does this negative sign indicates.

8. The radius of the innermost electron orbit of a hydrogen atom is a0 .What is the ratio of radii
of the n =2 and n= 3 orbits?

9. What is the angular momentum of an electron revolving in the 3rd orbit of an atom?

10. The ground state energy of Hydrogen atom is -13.6 eV. What is the KE of an electron in the
3rd excited state?

Submit