Question

What must happen for an electron to move to a higher energy level?

O
The electron must gain energy
o
The electron must transfer energy to another electron.
The electron must release energy through fission.
O
The electron must collide with the nucleus.

Answer 1

The electron must gain energy.

Step-by-step explanation:

For a electron to be promoted from one energy level to a higher energy level it has to absorb energy. If the electron decay back to the initial energy level will emit a photon with the a energy equal of the difference between the two energetic levels.