Question

emission of light from an atom occurs when an electron

o jumps from a lower to a higher energy level.

o moves within its atomic orbital.

o falls into the nucleus.

o drops from a higher to a lower energy level.

Explanation:

When an electron drops from a higher to a lower energy level, it releases energy in the form of light. When it jumps from a lower to a higher energy level, it absorbs energy. Moving within its atomic orbital doesn't emit light. Electrons don't fall into the nucleus in normal circumstances.

Answer:

drops from a higher to a lower energy level.