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Chemistry

Unit 2 Concept 3: Nuclear Chemistry

QuestionAnswer
Distinguish between a nuclear reaction and a chemical reaction. nuclear reactions change the nucleus of the atoms
Explain the difference between alpha, beta, and gamma radiation. Alpha: release of an alpha particle from the nucleus beta: release of a beta particle from the nucleus Gamma: release of gamma rays from the nucleus
Differentiate between the two types of nuclear reactions. Include what happens, where these types of reactions occur, and whether or not they create radioactive waste. Fission: Splitting of 1 larger atom into 2 or more smaller ones. Creates radioactive waste. Fusion: combning 2 or more lighter atoms into a larger one. does not make radioactive waste.
Write the nuclear equation for Barium-137 undergoing beta decay. 137Ba56 = 0e-1 + 137La57
Write the nuclear equation of Colbalt-54 undergoing alpha decay. 54Co27 = 4He2 + 50Mn25
After an alpha particle is released, the daughter nuclide is Lead-205. Write a balanced nuclear equation 209Po84 = 4He2 + 205Pb82
The half life of Cs-137 is 30.2 years. If the inital mass of the sample is 1000g, how much will remain after 151 years 31.25g
with a half life of 28.8 years, how long will it take 1000mg of strontium-90 to decay to 125 mg 86.4yr
Carbon-14 has a half life of 5730 years. when living, a sample of wood contained 24 g of C-14. Now as a fossilized sample, it contains 1.5g. How old is the sample 22920yr
Nuclear chemistry The study of changes to the nucleus of an atom
Radioactivity The admition of radiation
Radioactive isotopes have excess nuclear energy and thus are unstable and more likely to decay
Radiation the small particles and rays released during a nuclear reaction
Radioactive decay the spontaneous process by which an unstable nucleus can no longer hold itself together, so it loses energy and matter by emitting radiation
half-life the amount of time it takes for one-half of the radioactive isotope to decay
Chain reaction when something happens to due something else
Alpha decay release of an alpha particle from the nucleus
Nuclear fusion the combining of 2 or more lighter atoms into a larger one
Beta decay release of a beta particle from the nucleus
Nuclear Fission the splitting of 1 larger atom into 2 or more smaller ones.
Created by: Kamryn7
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