According to the Bohr model of the atom, the single electron of a hydrogen atom circles the nucleus

• in specific, allowed orbits.
• in one fixed orbit at all times.
• at any of an infinite number of distances, depending on its energy.
• counterclockwise.

A line spectrum is produced when an electron moves from one energy level

• into the nucleus.
• to another position in the same sublevel.
• to a higher energy level.
• to a lower energy level.

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NGSS.HS-PS4-1

If an electron moves from n=2 to n=4 ...

• it absorbs energy
• it releases energy

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NGSS.HS-PS1-4

If an electron moves from n=5 to n=2 ...

• it absorbs energy
• it releases energy

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NGSS.HS-PS1-2

Based on the picture, choose the best description of how wavelength and frequency are related

• As wavelength increases, frequency increases
• As frequency increases, wavelength remains the same
• As frequency increases, wavelength decreases
• frequency and wavelength mean the same thing

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NGSS.HS-PS4-1

Which kind of wave has the greatest frequency?

• gamma rays
• infrared
• ultraviolet
• microwaves

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NGSS.HS-PS4-1

The higher the frequency the ______ the energy. 

• higher
• lower
• neither, stays the same

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NGSS.HS-PS4-1

Thomas Young's double slit experiment proved that light had a _____ nature.

• particle
• wave
• particle-wave
• wave-particle

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NGSS.HS-PS4-3

Einstein's Photoelectric Effect proved that light had a ____ nature.

• particle
• wave
• wave-particle
• particle-wave

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NGSS.HS-PS4-3

De Broglie provided a mathematical model of the electron as a ____.

• wave
• particle
• tsunami
• energy

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NGSS.HS-PS4-3