QUIZ 4-ATOM(MIX)

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

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

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

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

5. In equation E_n= -13.6/𝑛²  eV, what does this negative sign indicates.

6. 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?

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

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

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

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