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Atomic physics questions

Atomic physics questions | form six Physics

Find Atomic physics examination questions, form six Physics in acaproso.com

# Question
1

Differentiate:
(i) Ionization energy from excitation energy.
(ii) Ionization potential from excitation potential.


Short answers
2

State Bohr’s frequency condition.


Short answers
3

Why a very thin gold foil is used in Rutherford’s α-particle scattering experiment?


Short answers
4

It is found experimentally that -2.2×10J is required to separate a hydrogen atom into a
proton and an electron. Compute the orbital radius and the velocity of the electron in a
hydrogen atom.


Mathematical Calculation
5

What is meant by the following terms as applied in atomic and nuclear Physics?
(i) Binding energy curve
(ii) Nuclear mass
(iii) Nuclear reaction
(iv) Artificial radioactivity


Short answers
6

In an experiment, the activity of 1.6mg of radioactive potassium chloride (chloride of isotope K - 40) was found to be 180 s-1​ . Taking molar mass of K - 40 Cl to be 0.075 kg mol-1​ , find the:
(i) number of K - 40 atoms in the sample
(ii) half-life of K - 40.


Mathematical Calculation
7

How long can an electric lamp of 200W be kept glowing by fusion of 3.0kg of deuterium
given that the fusion reaction taking place is _{1}^{2} extrm{H}+_{1}^{2} extrm{H} ightarrow _{1}^{3} extrm{He}+_{0}^{1} extrm{H}+3.27 MeV?


Mathematical Calculation
8

What is meant by the following terms as used in nuclear Physics?

  1. Mass defect
  2. Binding energy.

Short answers
9

Disintegration of _{92}^{238} extrm{U} to give alpha particles can be represented by the following equation: _{92}^{238} extrm{U} ightarrow _{90}^{234} extrm{Th}+_{2}^{4} extrm{He}. Use this equation to calculate :

  1. The total energy released in the disintergration reaction.
  2. The kinetic energy of alpha particles when the nucleus was at rest before disintegration.

Mathematical Calculation
10

Elaborate two aspects on which fission reactions differ from fusion reactions.


Short answers