Nuclear Chemistry.

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Presentation transcript:

Nuclear Chemistry

The student will: compare and contrast fission and fusion. write the symbols for alpha, beta, positrons, gamma ray and neutrons in a balanced nuclear reaction. discuss the penetrating ability of alpha, beta, positrons, gamma rays and neutrons . apply and conclude a balanced nuclear reaction. compute half life calculations to predict the amount of radioisotope present after a given period of time.

Hiroshima Nagasaki

Nuclear Fission: splitting of the atom into different parts

Nuclear Fusion:nuclear particles combining releasing energy

How the bomb works Critical mass

How a Nuclear Power Plant works

The student will: compare and contrast fission and fusion. write the symbols for alpha, beta, positrons, gamma ray and neutrons in a balanced nuclear reaction. discuss the penetrating ability of alpha, beta, positrons, gamma rays and neutrons . apply and conclude a balanced nuclear reaction. compute half life calculations to predict the amount of radioisotope present after a given period of time.

Nuclear Decay Particles Comes out of the nucleus Alpha: Beta: Positron: Gamma Ray: Neutron: Worksheet: balancing nuclear equations

63Li + 10n 42He + _________ 126C + 11H 137N + ________ 105B + alpha _________ + 147N 24195Am 23793Np + __________ 21482Pb ____________ + 21483B 6430Zn + -B 6329Cu + ________ 94Be + a _________ + n 14261Pm + ______ 14260Nd

4219K 0-1e + ___________ 23592U _________ + 23190Th 63Li + n -B + alpha + ___________ 2713Al + alpha 3015P + __________ 94Be + 11H ________ + 42He 23892U + 42He ___________ + 10n 21484Po + 242He + 20-1B ______________

The student will: compute half life calculations to predict the amount of radioisotope present after a given period of time.

Half-Life Nuclear Decay Students tear a piece of paper 1st half life = ½ ½ 2nd half life = ¼ ¾ 3rd half life = 1/8 7/8 4th half life = 1/16 15/16 Amount of sample gone Amount of sample left

Ws. 1. The half-life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope? 2. Assuming a half-life of 1599 years, how many years will be needed for the decay of 15/16 of a given amount or radium-226?

The half-life of radon-222 is 3. 824 days The half-life of radon-222 is 3.824 days. After what time will one-fourth of a given amount of radon remain? A sample contains 4.0mg of uranium-238. After 4.46x109years, the sample will contain 2.0mg of uranium-238. What is the half-life of uranium-238?

A sample contains 16mg of polonium-218 A sample contains 16mg of polonium-218. After 12 minutes the sample will contain 1.0mg of polonium-218. What is the half-life of polonium-210? If you start with 2.97 x 1022 atoms of Molybdenum-91, how many atoms will remain after 62.0 minutes? The half-life of Mo-91 is 15.49 minutes.

The half-life of Germanium-69 is 36 hours The half-life of Germanium-69 is 36 hours. What part of a sample Germanium-69 will remain after 6 days. The half-life of carbon-14 is 5,730 years. What fraction of a 1 gram sample of carbon-14 would remain after 17,129 years?

A sample of Cesium-125 contains 2 A sample of Cesium-125 contains 2.54 X 1018 atoms and it’s half life is 32.1 hours. How many of these atoms will remain after 96.3 hours?

If you had a sample of 55 grams of pure Uranium-238 If you had a sample of 55 grams of pure Uranium-238. Which if you did they probably would come and put you in jail as a possible terrorist. But anyway… If you had this sample and you kept in your closet for the entire 4 years of high school. How much Uranium would you have left on graduation day. (U half life = 4.46x109 years)

The student will: compute half life calculations to predict the amount of radioisotope present after a given period of time.