Question

which change occurs when an electron returns from a higher energy state to a lower energy state?

1. an ionic compound is formed, and energy is emitted.
2. an ionic compound is formed, and energy is absorbed.
3. a specific amount of energy is absorbed.
4. a specific amount of energy is emitted.

Explanation:

When an electron moves from a higher to lower energy state, it releases the excess energy as a discrete, specific amount of electromagnetic radiation (photons). Ionic compound formation is unrelated to electron energy state transitions in a single atom. Energy absorption occurs when electrons move to higher energy states, not lower.

Answer:

1. A specific amount of energy is emitted.