Question

module 4: electrons in atoms test - 11/14/2025
when electromagnetic radiation strikes the surface of a metal, electrons are ejected from the metals surface. this is a description of the
aufbau principle.
quantum theory.
effects of diffraction.
photoelectric effect.

Explanation:

• Aufbau principle: States that electrons occupy the lowest - energy orbitals first. It is about electron configuration in atoms, not about electron ejection due to electromagnetic radiation.
• Quantum theory: A broad theory about the quantization of energy, matter, etc. It is not specifically about the ejection of electrons from a metal surface by electromagnetic radiation.
• Effects of diffraction: Deals with the bending of waves (including electromagnetic waves) around obstacles or through openings. It has no relation to electron ejection from a metal surface.
• Photoelectric effect: Defined as the ejection of electrons from a metal surface when electromagnetic radiation (such as light) of sufficient frequency strikes it.

Answer:

photoelectric effect.