1. Energy required to excite an electron in hydrogen atom to its ground state to its first excited state is
2. According to Bohrโs 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 Bohrโs model is applicable to which kind of atoms
7. In equation En= -13.6/๐2 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?