Question

what happens to atoms in an excited state?

they change into a particular shape.
they give off a particular color of light.
they change into atoms of different elements.

Explanation:

Understand atomic structure

Using the Atoms and Molecules knowledge point, we recall that electrons orbit the nucleus in specific energy levels.

Define the excited state

An excited state occurs when an electron absorbs energy and jumps to a higher energy level.

Analyze relaxation and emission

To return to a stable ground state, the electron must release this excess energy.

Connect energy release to light

The released energy is emitted as a photon of light with a specific wavelength, corresponding to a particular color.

Evaluate the given options

• Shape change: Atoms do not change their macroscopic shape.
• Element change: This requires nuclear reactions, not electronic excitation.
• Light emission: Releasing energy as light is the characteristic behavior.

Answer:

• They change into a particular shape.
• They give off a particular color of light. (Correct answer)
• They change into atoms of different elements.