Question

emission of light from an atom occurs when an electron ____. drops from a higher to a lower energy level falls into the nucleus moves within its atomic orbital jumps from a lower to a higher energy level

Explanation:

According to the Bohr model of the atom, when an electron drops from a higher - energy level to a lower - energy level, it emits a photon (light). When an electron jumps from a lower to a higher energy level, it absorbs energy. Electrons do not fall into the nucleus as the nucleus is positively charged and electrons are negatively charged, and there is a balance of forces (electrostatic and centrifugal in the Bohr model) that keep electrons in orbitals. Also, moving within an atomic orbital (without a change in energy level) does not result in light emission.

Answer:

drops from a higher to a lower energy level