Class IX

If n = 3 we are in
  1. K shell
  2. L shell
  3. M shell
  4. f shell
f shell
  1. heavy water
  2. light water
  3. water
  4. none of above
Energy of an electron in orbit is proportional to
  1. distance between shells
  2. distance from nucleus
  3. distance between two nuclei
  4. positive charge inside nucleus
Energy of emitted light is equal to
  1. sum of energy levels
  2. difference between energies of orbits
  3. product of energies of orbits
  4. none of above
Protium has
  1. one neutron
  2. two neutrons
  3. no neutron
  4. 3 neutrons
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