QUIZ 4-ATOM(MIX)

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

2. According to Bohr’s postulates, an electrons revolve around the nucleus in ______ orbits.

3. The angular momentum of the electron in the n^th allowed orbit is;

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

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

6. The Bohr’s model is applicable to which kind of atoms

7. In equation E_n= -13.6/𝑛²  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 3^rd 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
3^rd excited state?