1. What is the angular momentum of an electron revolving in the 3rd orbit of an atom?
2. The Bohrโs model is applicable to which kind of atoms
3. The angular momentum of the electron in the nth allowed orbit is;
4. The angle of scattering ฮธ ,for zero value of impact parameter is ____________.
5. In equation En= -13.6/๐2 eV, what does this negative sign indicates.
6. Energy required to excite an electron in hydrogen atom to its ground state to its first excited state is
7. 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?
8. According to Bohrโs postulates, an electrons revolve around the nucleus in ______ orbits.
9. The ground state energy of Hydrogen atom is -13.6 eV. What is the KE of an electron in the
3rd excited state?
10. The existence of positively charged nucleus was established by,