Physics Test - Atom
Q1. List the
conclusions made by Rutherford to define structure of an atom.
Q2. State
three postulates of Bohr’s model of an atom.
Q3.
Determine the speed of the electron in the n=3 orbit of He+.
Q4.
Calculate the radius of third Bohr’s orbit of hydrogen atom and the energy of
the electron in that orbit. Given that h= 6.625*10-34 J s, e= 1.6*
10-19 C, m=9.1*10-31kg, c= 3*108 m/s and εo=8.85*10-12
F/m.
Q5. The Hα line of Balmer series is obtained
from the transition n=3 (energy = 1.5eV) to n=2 (energy = -3.4eV). Calculation
the wavelength of this line. Given that h= 6.625*10-34 J s, e= 1.6*
10-19 C, m=9.1*10-31kg, c= 3*108 m/s
Q6. The
radius of the first electron orbit of the hydrogen atom is 5.3*10-11 m.
What is the radius of second orbit?
Q7. What is
Bohr’s quantisation condition for angular momentum of electron in an atom?
Q8. Name the
series of hydrogen spectrum which has least wavelength.
Q9. Name the
series of hydrogen spectrum which has ultraviolet region.
Q10. Calculate the energy requires to excite the
electron from first orbit of the hydrogen atom to the third orbit in eV.
Q11. What is
distance of closest approach?
Q12. What is
ionisation potential? Calculate it for a hydrogen atom.
No comments:
Post a Comment