Which of the following statements about electrons is not true?
a) electrons orbit the nucleus rather like planets orbiting the sun.
b) within an atom, an electron can have only particular energies.
c) electrons can jump between energy levels in an atom only if they receive or give up an amount of energy equal to the difference in energy between the energy levels.
d) an electron has a negative electrical charge.
e) electrons have very little mass compared to protons or neutrons