Chemistry Honors Review - Properties of Electrons

Which of the following correctly describes the relationship between wavelength and frequency for electromagnetic waves?

• As wavelength increases, frequency increases.

• As wavelength increases, frequency decreases.

• Wavelength and frequency are not related.

• As frequency increases, wavelength remains constant.

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Which region of the electromagnetic spectrum has the highest energy photons?

• Radio waves

• Infrared

• Ultraviolet

• Gamma rays

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What is the speed of all electromagnetic waves in a vacuum?

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Which of the following best explains the photoelectric effect?

• Electrons are emitted from a metal surface when it is heated.

• Electrons are emitted from a metal surface when light of sufficient frequency shines on it.

• Protons are emitted from a metal surface when light shines on it.

• Neutrons are emitted from a metal surface when it is cooled.

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Which color of visible light has the shortest wavelength?

• Red

• Green

• Blue

• Violet

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Which equation correctly relates the energy of a photon to its frequency?

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Which of the following statements is true about photon emission in atoms?

• Photons are emitted when electrons move to higher energy levels.

• Photons are emitted when electrons move to lower energy levels.

• Photons are emitted only when atoms are ionized.

• Photons are emitted when protons move between energy levels.

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Which of the following electromagnetic waves has the longest wavelength?

• X-rays

• Ultraviolet

• Visible light

• Radio waves

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A metal surface emits electrons only when exposed to ultraviolet light, but not to visible light of any intensity. What does this observation support about the photoelectric effect?

• The energy of light depends only on its intensity.

• The energy of light depends on its frequency.

• The energy of light depends on the metal’s temperature.

• The energy of light depends on the number of photons.

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