AP Chemistry 3.12: Properties of Photons

Practice AP Chemistry 3.12 questions on calculating photon energy, wavelength and frequency and relating absorption or emission to electronic transitions.

Exam points

Use particle models and intermolecular forces to explain solution properties, phase changes, and behavior.
Interpret experimental observations and molecular representations to connect structure with macroscopic properties.

Covered syllabus points

3.12.A—Explain the properties of an absorbed or emitted photon in relationship to an electronic transition in an atom…

[Maximum number: 1]

Answer the following questions about the element Si and some of its compounds.

A single photon with a wavelength of $4.00 \times 10^{-7} \mathrm{~m}$ is absorbed by the Si sample. Calculate the energy of the photon in joules.

For the correct calculated value: 1 point

E=h v=h\left(\frac{c}{\lambda}\right)=6.626 \times 10^{-34} \mathrm{~J} \cdot \mathrm{~s}\left(\frac{2.998 \times 10^{8} \mathrm{~m} \mathrm{~s}^{-1}}{4.00 \times 10^{-7} \mathrm{~m}}\right)=4.97 \times 10^{-19} \mathrm{~J}

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Covered syllabus points

3.12 Properties of Photons question 1