Photoelectric Effect Daily

Albert Einstein proposed the photoelectric effect which states that ​ (a)   of ​ (b)   caused electrons to become "​ (c)   " and be ​ (d)   from an atom.

• absorption
• photons
• excited
• ejected
• emission
• rested
• captured

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In 1913, Niels Bohr proposed that electrons can move around the ​​ (a)   on in ​ (b)   orbits with certain allowed ​ (c)   . Later we learned that electrons orbit the nucleus in a ​ (d)   orbit.

• nucleus
• circular
• energy levels
• random
• electron cloud
• probable
• quantum energy

Place the following parts of the photoelectric effect in the order they occur.

• We can see the photon by observing a color

• Electron jumps to a higher energy level in an excited state

• Energy is emitted in the form of a photon

• Electron falls to a lower energy level back to ground state

• Energy is absorbed by the electron

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Here we see an electron in the ground state and excited state. If the inner ring is energy level n=1 and the outer is n=2, which energy level has more energy?

• n=1

• n=2

• they are the same

In the diagram on the left, a photon is being emitted. What must have just occurred in the atom for the photon to be released?

• Energy was absorbed.

• The electron lost energy and fell an energy level.

• The electron jumped up to a higher energy level

• The electron is in the excited state.

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Which has more energy?

• An electron in an excited state

• An electron at the ground state

• An electron in energy level n=1

• An electron that is not a valence electron

Which of the jumps in energy levels would create a photon emission with the most energy?

• n=1 to n=2

• n=2 to n=3

• n=2 to n=4

• n=1 to n=4

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NGSS.HS-PS4-3

The image shows a graph of the wavelengths of visible light. Which color of light has the longest wavelength and thus lowest energy?

• Violet

• Cyan

• Yellow

• Red

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Ultraviolet light has a shorter wavelength that violet light and is outside the spectrum we can see as humans. With a shorter wavelength, UV light has more energy than violet light.

• True

• False

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NGSS.HS-PS4-1

This image shows some of the colored flames we will see in the fire lab. The color of light can show us which emission has the most energy released by the electrons. Which compound's electrons had the largest change in energy levels?

• Strontium

• Calcium

• Potassium

• Copper

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