One of the main ideas of the Quantum Theory is that:
the energy of an electron can never be changed
the energy of an electron can be varied by any amount
the energy of an electron can be changed only by set amounts
the energy of an electron can always be predicted with 100% accuracy
the energy of an electron can never be changed
the energy of an electron can be varied by any amount
the energy of an electron can be changed only by set amounts
the energy of an electron can always be predicted with 100% accuracy