Miscellaneous
Nuclear Reactions
Half-Life
Fission
Fusion
100

part of the atom involved in a normal chemical reaction

What is an electron

100

Name 2 helpful uses of nuclear reactions

x-rays, treat cancers, generating heat and light

100
What is half-life
Average time it takes for half the amount of a radioactive element to decay
100
What is fission?
a nuclear reaction that invlolves the splitting of a heavy nucleus into a lighter nucleus.
100
What is fusion?
Two smaller nuclei combining to form a larger nucleus, releasing tremendous amounts of energy. Type of reaction that occurs in the stars.
200

Part of the atom involved in a nuclear reaction.

nucleus

200

Three main types of nuclear radiation

alpha, beta, gamma

200
Thorium-234 has a half-life of 24 days, started with 100 g how much is left after 48 days?
What is 25 grams
200

The elements used in the atomic bomb

Uranium-235 and Plutonium-239

200
Why isn't fusion used in power plants?
required temperatures are too high
300

Who discovered Polonium and Radium

Marie Curie

300

What is the main benefit of fission reactions?

huge amounts of energy

300
Plutonium-239 is 24,110 years how much of 100 g remains after 96,400 years?
What is 6.25 grams
300
Least penetrating form of radiation
What is an alpha particle
300

When was the first uranium bomb used?

1945

400

What isotope of uranium was found to be easily fissionable?

U-235

400

What are the reactants and products in a fission reaction?

A neutron and a fissionable isotope are reactants; more neutrons and smaller fragments are the products

400
Radium-266 has a half life of 1599 years, how much of 15.0 mg is left after 6369 years.
What is 0.94 mg
400
What type of reaction does fission lead to?
chain reaction
400

Where are fusion reactions most common?

the sun

500

Compare and contrast fission and fusion. (One similarity, one difference)

both release high amounts of energy; both are nuclear reactions (involve the nucleus); fission is "splitting" a nucleus, fusion is combining 2 smaller nuclei; fission happens in nuclear power plants and atomic bombs, fusion is only observed on the sun.

500
What % of the U.S. energy is gotten from nuclear power?
Around 20%
500
Thorium-227 is 16 days, how many days are required for three-fourths to decay?
What is 32 days
500

What is mass defect in relation to fission?

The difference between the mass of the original nucleus and the combined product nuclei ('missing' mass is converted into energy)

500

What are the 3 most common byproducts of nuclear fusion?

helium, neutrons, and energy

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