### Change in energy of an electron

Posted:

**Sat Oct 14, 2017 1:05 pm**Hi, I have two questions:

1. when we are finding the change in energy using the equations, are we finding the change in energy of only the electron? Will the change in energy be either positive or negative based on if the electron is absorbing or emitting?

2. When an electron emits a photon, will the energy of the photon always be labeled as positive?

1. when we are finding the change in energy using the equations, are we finding the change in energy of only the electron? Will the change in energy be either positive or negative based on if the electron is absorbing or emitting?

2. When an electron emits a photon, will the energy of the photon always be labeled as positive?