Question

of the following choices, choose the correct word that best represents
a. an electromagnetic radiation spectrum in which wavelengths of light emitted by a substance show up as brightly colored lines on a black background
b. the process in which matter emits electrons as the result of absorbing light
c. the modern model of atomic structure in which protons and neutrons make up the very dense, tiny nucleus, and electrons surround the nucleus in clouds of probable locations
electron cloud model
emmission spectrum
photoelectric effect
daltons theory

Explanation:

• Option A: This describes an emission spectrum. In an emission spectrum, when a substance emits light, the wavelengths of that light show up as brightly - colored lines on a black background.
• Option B: This is the definition of the photoelectric effect. When matter absorbs light and emits electrons as a result, it is the photoelectric effect.
• Option C: This is the description of the electron - cloud model of the atom. Protons and neutrons are in the dense nucleus, and electrons are in clouds of probable locations around the nucleus.

Answer:

A. emission spectrum, B. photoelectric effect, C. electron cloud model