Each atom in the periodic table has a unique set of spectral lines. Which one of the following statements is the best explanation for this observation?
A)Each atom has a dense central nucleus.
B)Electrons in atoms orbit the nucleus.
C)Each atom has a unique set of energy levels that electrons can move between.
D)Electrons in atoms are in constant motion.
E)Each atom is composed of positive and negative charges.

Question

Quizplus · Accepted Answer

The unique set of spectral lines observed for each atom corresponds to the specific energy levels that electrons can occupy within that atom. When an electron moves from one energy level to another, it emits or absorbs a photon of a specific wavelength, resulting in the characteristic spectral lines for that atom.

Each Atom in the Periodic Table Has a Unique Set