Light and Electrons

The lines in the emission spectrum for hydrogen are formed from ___.

• energy given off when the electron moves from higher energy levels to lower energy levels

• electrons given off as hydrogen burns

• protons given off when protons move from higher energy levels to lower energy levels

• electrons given off as hydrogen cools

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The distance from one crest to the next.

• wavelength

• frequency

• light year

• hertz

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The number of waves that pass a fixed point in unit time

• astronomical unit

• frequency

• wavelength

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A packet "particle" of electromagnetic energy is known as a

• neutron

• photon

• Hertz

• proton

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Electromagnetic radiation can sometimes behave like _______ and at other times like __________. Choose two.

• a wave

• a particle

• gravity

• matter

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Which type of electromagnetic radiation has the most energy?

• x rays

• gamma rays

• radio waves

• visible light

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Which given type of electromagnetic radiation has the lowest energy?

• infrared

• ultraviolet

Which visible light has the most energy?

• yellow

• violet

• red

• green

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When an atom absorbs energy, electrons .....

• moves up an energy level

• goes down an energy level

• are removed from the atom

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When electrons move down an energy level, the atom ......

• releases equal energy as a photon

• splits

• bonds to another

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