Be careful. Even simple calculations in atomic physics involve awkward numbers, and slightly obscure methods. Remember eV after a number is the unit of energy called the electron volt. In a relationship, eV is the product of the electronic charge e and a Voltage V.
You will need a list of constants.
1 Particles in fields
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a Kinetic energy and/or the velocity of an electron accelerated through a potential difference in Joules. b The acceleration of an electron in an electric field. c The path radius for a particle of energy eV, accelerated at right angles to a magnetic field. d The ratio e/m for an electron accelerated at right angles to a magnetic field. e The velocity of an electron passing undeflected through crossed fields. f Cyclotron frequency. [A cyclotron confines an electron to orbit in a circular path with a uniform magnetic field.] |
2 The hydrogen atom (Bohr's model)
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a Orbital radius for an electron circling a nucleus. [Fictional situation - the electron cannot orbit because it would radiate energy - but remarkably the value of Rydberg's constant is found, and the diameter of the ground state 'orbit' is of the right value.]. b Hydrogen atom energy levels, and ionization energy. [Again, the model is flawed but the calculated ionization energy has the right value.] c Rydberg's famous empirical formula for the wavelengths of the lines of the hydrogen spectrum. The value of the constant R. |
3 Photon energy
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a The value of Planck's constant, from stopping voltage and wavelength data for a photocell. b Photon energy for radiation of known wavelength. c Minimum X-ray wavelength, given the tube anode voltage. |
4 Alpha particles
| Closest approach of an alpha particle to a stationary heavy nucleus. |
5 Radioactive decay
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a Decay constant to half-life conversion. b Activity at any time, given the half-life, or the decay constant. c Energy released during fission (or fusion), from the mass deficit (mass loss). d The energy equivalence of the mass of the electron in MeV. |
6 The de Broglie wavelength
| The de Broglie wavelength, for a particle of known momentum. |