Quantum Physics Review

In a hydrogen atom what is the energy of an electron in the 2nd excited state?

• 1.51 eV

• 3.4 eV

• 6.04 eV

• 13.6 eV

Each element on the periodic table can be identified by its

• classification as a solid, liquid or gas.

• location on the table.

• ability to react to form compounds.

• unique spectral "fingerprint."

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NGSS.HS-PS1-1

In order to go from ground state to an excited state, an electron must

• emit energy

• absorb energy

• wiggle

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When an electron returns to ground state from an excited state, the atom will

• emit energy

• absorb energy

• rotate

• wiggle

Line emission spectrum shown below happens when

• Electron transition from lower to higher energy level.
• Electron transition from higher to lower energy level.
• Electron exist in fixed energy states
• Electron transition between different energy levels.

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Which elements are in the unknown sample?

• A and B
• B and C
• A and D
• B and D

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NGSS.HS-PS1-1

If the brightness of a beam of light increases without changing its color, the ______ will increase.

• number of photons

• frequency of the light

• energy of the photons

• wavelength of the photons

What is the energy, in eV, of a photon that has a wavelength of 620 nm?

• 1eV

• 2eV

• 3eV

• 4eV

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NGSS.HS-PS4-1

In the photoelectric effect, if the incident photons have a wavelength that is larger than the threshold wavelength, _______.

• electrons will be ejected from the metal surface

• there will be photoelectric current

• no electrons will be emitted from the metal surface

• the kinetic energy of the ejected electrons increases

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NGSS.HS-PS4-3

NGSS.HS-PS4-4

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

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