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15
×
Electron transitions in Bohr’s model produce:
Only infrared light
Discrete spectral lines
No energy
Continuous radiation
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15
×
Bohr’s model works perfectly for multi-electron atoms.
False
True
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boom
Lose 50 points!
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seesaw
Swap points!
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rocket
Go to first place!
Okay!
×
lifesaver
Give 20 points!
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15
×
What happens when an electron jumps from a higher to a lower energy level?
A photon is absorbed
A photon is emitted
Electron disappears
Nothing happens
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trap
No points!
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star
Double points!
Okay!
×
gift
Win 10 points!
Okay!
×
baam
Lose 25 points!
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15
×
Observable phenomena of atoms include:
Spectral lines
Both a and b
Photoelectric effect
Neither
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15
×
In Bohr’s model, electrons:
Are stationary
Can have any energy
Exist only in a cloud
Move in fixed circular orbits
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banana
Go to last place!
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seesaw
Swap points!
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×
gift
Win 5 points!
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×
baam
Lose 15 points!
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15
×
Photon emission occurs when an electron absorbs energy and jumps to a higher level.
False
True
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15
×
Which formula represents photon energy?
E = hf
V = IR
F = ma
E = mc²
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15
×
Classical physics could explain discrete spectral lines.
False
True
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15
×
Compared to Bohr, the electron cloud model is better for:
Ignoring energy levels
Describing photons
Predicting chemical behavior
Explaining hydrogen spectra only<br>
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15
×
The electron cloud model keeps quantized energy levels.
False
True
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15
×
Einstein explained the photoelectric effect using:
Continuous wave theory
Bohr’s orbitals
Classical electricity
Photon theory (light as particles)
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15
×
Which of the following is a limitation of Bohr’s model?
Cannot explain multi-electron atoms
Ignores the nucleus
Does not have energy levels
Cannot predict hydrogen spectrum
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15
×
In the photoelectric effect, electrons are ejected when:
Any light shines on the metal
Light frequency is above threshold
Metal is hot
Light intensity is high enough
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