Unit 2 Part 2 Notes 2: What is Light? cont'd

Photoelectric effect provides the evidence for the ______ nature of radiation.

• dual

• wave

• particle

• electromagnetic

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A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

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This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model

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The photoelectric effect only occurs if the light shining on the metal is:

• coherent.
• above a minimum intensity.
• above a minimum frequency.
• above a minimum wavelength.

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Light acts like

• a wave.

• a particle.

• Both a wave and a particle

• neither a wave nor a particle.

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According to the model Niels Bohr created, electrons can occupy certain orbits., meaning energy is _______.

• fresh

• unpredictable

• continuous

• quantized

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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• as wavelength increases, frequency decreases

• as wavelength increases, frequency increases

• wavelength and frequency have no relationship

• wavelength only impacts energy, not frequency

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Which of the following would give a continuous spectrum? (check all that apply)

• hydrogen lamp

• the sun

• neon lights

• white light bulbs

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Why do the spectra of individual elements only have certain bands of colors?

• they don't have enough electrons

• not all of the electrons are changing energy levels

• electrons are only allowed to have certain energies

• some electrons are moving up levels while some are moving down

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