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1.
Choose all correct options below (unless all are incorrect):

The Bohr model of the atom

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2.
Light emitted by hot neon gas, if analyzed with a spectroscope, is

a series of spectral lines
a continuous rainbow
nothing but infrared light
just like the light from a car's taillight






































3.
If an atom has 4.5 eV of energy, and it "wants" to raise its energy to a higher value of 6.6 eV, how energetic a light quantum must it absorb?

eV







































4.
If the Sun is very hot and very opaque, why does it have absorption lines in its spectrum?

Answer





































5.
A given gas -- say, sodium vapor -- produces spectral emission lines

if it is very cool
at the same wavelengths as its absorption lines
that we call a continuous ("rainbow") spectrum
when sodium atoms gain energy






































6.
If an atom has allowed energy levels at 0.6, 1.7, and 4.5 eV, what is the energy of the least energetic quantum it can emit?

eV







































7.
According to Niels Bohr, an atom's chemical behavior depends primarily on its

number of outer electrons
mass
number of neutrons
diameter






































8.
The colors present in a hot gas's emission-line spectrum depend primarily on the gas's

(You can check 0, 1, or 2 boxes before submitting.)

temperature
chemical composition







































9.
Why must a gas be hot in order to produce emission lines?

Answer





































10.

Choose all correct options below (unless all are incorrect):

It is odd -- that is, non-classical -- that electrons in the Bohr atom

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