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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 binding energy from mass defect.


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2

Calculate the binding energy per nucleonm in MeV and the packing fraction of an alpha particle. Given Mass of proton=1.0080u, Mass of neutron=1.0087u and mass of alpha particle=4.0026u.


Mathematical Calculation
3

State any three limitation of Bohr`s model of the hydrogen atom.


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4

In a hydrogen atom model , an electron of mass m and charge e revolves around the nucleus in a circular orbit of radius r. Develop an expression for the radius r of the orbit in terms of m,e,pi, the quantum number n, Planck constant h and the permittivity of free space varepsilon _{0} and hence, use their values to find the Bohr`s radius.


Mathematical Calculation
5

Differentiate between ionization energy and excitation energy.


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6

Why hydrogen spectrum contains a larger number of spectral lines although its atom has only one electron?


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7

Figure 2 shows the energy level diagram of the hydrogen atom.

Figure 2 shows the energy level diagram of the hydrogen atom.

  1. Calculate the frequency and te wavelength of the radiation emitted as a result of an electron transition from n=4 to when an electron is in its ground state.
  2. What is the energy at the level where n=5?

Mathematical Calculation
8

Use the Rydberg constant , RH=1.0974x107m-1 to calculate the shortest wavelength of the Balmer series.


Mathematical Calculation
9

Use the Bohr`s theory for hydrogen atom to determine the :

  1. Radius of the dirst orbit of the hydrogen atom in AA units
  2. Velocity of the electron in the forst orbit.

Mathematical Calculation
10

What is ionization potential of an atom?


Short answers