Question

how does the energy of an electron change when the electron moves closer to the nucleus?
it stays the same.
it increases.
it doubles.
it decreases.

Explanation:

Electrons in an atom have different energy levels. The energy of an electron is related to its distance from the nucleus. When an electron moves closer to the nucleus, it moves to a lower - energy orbital. This is because the electrostatic attraction between the negatively - charged electron and the positively - charged nucleus is stronger at a closer distance, and the electron is in a more stable (lower - energy) state.

Answer:

It decreases.