AP®︎ Chemistry: Topic 3.12 Flashcards

Master key terms and definitions for Topic 3.12 of AP Chemistry – Properties of Photons to help you prep for quizzes and the AP exam.

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Term

Photon

Definition

A discrete packet of electromagnetic energy absorbed or emitted during an electronic transition.

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Photon
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A discrete packet of electromagnetic energy absorbed or emitted during an electronic transition.

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Planck's Equation
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E = hν, relating photon energy to frequency through Planck's constant.

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Planck's Constant
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The proportionality constant 6.626 × 10^-34 J·s used in E = hν.

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Electronic Transitions and Photons
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Electrons change energy levels by absorbing or emitting photons with matching energy.

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Frequency, Wavelength, and Photon Energy
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Frequency and wavelength are inversely related, and higher frequency means higher photon energy.

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Photoelectric Effect and Threshold Frequency
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Electrons are emitted from metals only when light reaches a minimum frequency.

3.12.A