Alpha Decay
Beta Decay
Half Lives
Fission & Fusion
Structure of the Atom
100
This is also known as an alpha particle.
What is the nucleus of a helium atom?
100
This is also known as a beta particle
What is an electron?
100
This is the definition of a half life
What is the amount of time for half of a radioactive sample to decay?
100
This fissionable element is often used in power plants to generate electricity.
What is Uranium?
100
These particles orbit the nucleus in valence shells
What are electrons?
200
Uranium-235 (atomic number = 92) undergoes alpha decay to become this element.
What is Thorium-231?
200
Beta particles can be stopped by this material (and thickness).
What is a few cm of aluminum?
200
This radioactive isotope is used to determine the age of most organic material.
What is carbon-14?
200
Fusion in the Sun's core creates this element from hydrogen.
What is Helium?
200
These particles are called nucleons.
What are protons & neutrons?
300
Smoke detectors use this radioactive element that undergoes alpha decay.
What is Americium?
300
A neutron spontaneously decays into these products during Beta decay.
What are a proton, electron, and an anti-neutrino?
300
This is how long you would have to wait for 100 g of a radioactive sample with a half life of 5 years to decay to 25 g.
What is 10 years? (2 half lives)
300
Uranium is triggered by this particle to initiate a chain reaction.
What is a neutron?
300
This the force that binds protons & neutrons together.
What is the strong force?
400
Lead-196 is the result of alpha decay from this element.
What is Polonium-210?
400
Cesium-137 (atomic number 55) undergoes beta decay and produces this element.
What is Barium-137?
400
Uranium-239 has a half life of 23.5 minutes. This is how much Uranium-239 will be left after two hours after starting with 100 grams.
What is 2.9 g?
400
This product of simple hydrogen fusion is an intermediate step that produces this element.
What is deuterium (or hydrogen-2)?
400
This is the heaviest stable element.
What is Bismuth?
500
This is the amount of energy released in the alpha decay of Uranium-238 (atomic number 92) into Thorium-234.
What is 4.1 x 10^14 MeV?
500
Sodium-22 (atomic number 11) undergoes beta positive decay and becomes this element, a positron, and a (regular) neutrino.
What is Neon?
500
This is how much time will pass while waiting for 100 g of Polonium-210 (half life of 138 days) to decay into 10 g.
What is 458 days?
500
Uranium-236 will fission into Barium-141 (atomic number 56), 3 neutrons, and this other element.
What is Krypton-92?
500
These strange particles combine to create protons & neutrons
What are quarks?
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