Question

9cw1
emission of light from an atom occurs when an electron
drops from a higher to a lower energy level.
falls into the nucleus.
jumps from a lower to a higher energy level.
moves within its atomic orbital.

Explanation:

When an electron drops from a higher to a lower energy level, it emits energy in the form of light. Electrons do not fall into the nucleus as atoms are stable. Jumping from a lower to a higher energy level requires energy absorption, not emission. Moving within an atomic orbital does not involve light emission.

Answer:

drops from a higher to a lower energy level.