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paper 1
atomic structure/radioactivity
Nuclear Decay Equations
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Cards (23)
What do alpha particles consist of?
Two
protons
and two
neutrons
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How are alpha particles represented?
As
helium
2
4
^{4}_{2}
2
4
or the Greek letter alpha
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What happens to uranium-238 during alpha decay?
It loses two
protons
and two
neutrons
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What is the new mass number of uranium-238 after alpha decay?
234
234
234
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What is the new atomic number of uranium-238 after alpha decay?
90
90
90
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What element does uranium-238 become after alpha decay?
Thorium
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How would you write the equation for the alpha decay of radium-226?
Radium-226 to
radon
plus helium
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What is the mass number of the decay product from radium-226?
222
222
222
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What is the atomic number of the decay product from radium-226?
86
86
86
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What element does radium-226 become after alpha decay?
Radon
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What occurs during beta decay?
A
neutron
turns into a
proton
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What happens to the atomic number during beta decay?
It increases by one
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What is emitted during beta decay?
A fast-moving
electron
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What is the mass number of carbon-14?
14
14
14
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What element does carbon-14 become after beta decay?
Nitrogen
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How is a beta particle represented?
With a
minus one
charge and
zero
mass
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What is gamma radiation?
Pure
energy
with no
mass
or charge
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What happens to thorium-234 during gamma decay?
It
remains
thorium-234
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How are neutron emissions represented?
By subtracting one from the
mass number
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What does beryllium-9 decay into?
Beryllium-8
plus a
neutron
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What is the mass number of beryllium-9?
9
9
9
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What is the mass number of beryllium-8?
8
8
8
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What is the main takeaway from the video?
Understanding
nuclear equations
for
radiation
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