CPC Electron Unit Vocabulary

How does the quantum mechanical model of the atom treat electrons?

• As particles in fixed orbits

• As waves with probabilistic locations

• As particles with definite paths

• As static charges around the nucleus

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Fill in the blanks using the available answer choices. Heisenberg’s uncertainty principle states that it is impossible to know precisely the position and _________ of a particle at a given time.

• velocity

• mass

• force

• orbital

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The ________ predicts that all moving particles have wave characteristics.

• De Broglie equation

• Planck's constant

• Newton's law

• Einstein's theory

• Heisenberg's principle

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The De Broglie equation relates each particle’s wavelength to its mass, frequency, and the number 6.626 × 10³⁴ J·s, known as ________.

• Planck's constant

• Newton's law

• Einstein's theory

• Heisenberg's principle

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Electromagnetic radiation is:

• A form of wave energy that is all around us.

• A type of chemical reaction.

• A process of heat transfer through direct contact.

• A method of sound propagation.

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The shortest distance between equivalent points on a continuous wave; is usually expressed in meters, centimeters, or nanometers.

• wavelength

• frequency

• amplitude

• velocity

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The number of waves that pass a given point per second.

• frequency

• amplitude

• wavelength

• velocity

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The height of a wave from the origin to a crest, or from the origin to a trough.

• amplitude

• frequency

• wavelength

• velocity

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The _______________ includes x-rays, ultraviolet light, visible light, microwaves, and gamma waves.

• electromagnetic spectrum

• visible spectrum

• infrared spectrum

• acoustic spectrum

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Two of the discoveries that led to the development of the quantum mechanical model of the atom were​ (a)   , which is a set of frequencies of electromagnetic waves given off by atoms of an element, and the ​ (b)   , a phenomenon on which photoelectrons are emitted from a metal’s surface when a light of a certain frequency shines on the surface.

• ultraviolet catastrophe

• blackbody radiation

• gamma radiation

• atomic emission spectra
• photoelectric effect

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