Fission vs. Fusion Atom Review Jeopardy

Warm - Up Write the accomplishment of the scientists listed below Democritus Dalton Thomson Millikan Rutherford Bohr Schrodinger

Objective Today I will be able to: Distinguish between different types of radiation with respect to their penetration power. Complete a Venn Diagram to compare and contrast nuclear fission and fusion. Apply concepts about the atom to reviewing for an exam

Homework Study for the Exam Thursday

Agenda Warm – Up Personal Radiation Half-Life Problems Fission vs. Fusion Notes Fission vs. Fusion Venn Diagram Review Questions? Exit Ticket

Task: Calculate your radiation exposure

www.epa.gov

Radioactive Energy Spread Haz-map.com

What does your radiation exposure value mean? No evidence of cancer occurring <10,000 mrem exposure Body has time to repair cells when exposed to low concentrations of radiation Correlation has been found with cancer and radiation exposure >50,000 mrem

Half-Life Practice Problems There are 3.29 g of iodine-126 remaining in a sample originally containing 26.3 g of iodine-126. The half-life of iodine-126 is 13 days. How old is the sample?  A sample that originally contained 2.5 g of rubidium-87 now contains 1.25 g. The half-life of rubidium-87 is 6 x 1010 years. How old is the sample? Is this possible? Why or why not?

Nuclear Fission and Fusion Notes

Nuclear Fission Nuclear Fusion

Nuclear Fission A heavy nucleus splits into more stable nuclei of intermediate mass.

Atomic Bombs Atomic bombs are an example of Fission Reactions. “Little boy” and “Fat man” were Atomic bombs made from fission reactions with uranium and plutonium respectively. A fission chain reaction is started and continues until the bomb destroys itself.

Little Boy and Fat Man

Nuclear Power Plants Uranium-235 undergoes nuclear fission and releases thermal (heat) energy. This turns water to steam which spins turbines. The turbines produce electrical energy. Nuclear waste is fuel rods with unreacted uranium and radioactive products of fission. Right now this waste is buried in waste management facilities, like Yucca Mountain.

http://www. cleanenergyinsight http://www.cleanenergyinsight.org/wp-content/uploads/2010/03/yuccamountain.jpg

Nuclear Fusion Low-mass nuclei combine to form a heavier, more stable nucleus.

Hydrogen Bombs Hydrogen bombs are an example of nuclear fusion. Two isotopes of hydrogen, 2H and 3H, fuse together and produce a lot of energy in the process. H-bombs release significantly more energy than atomic bombs.

The Sun: Nuclear Fusion + + + Energy Four hydrogen nuclei (protons) Two beta particles (electrons) One helium nucleus

Release huge amounts of energy Nuclear Fission Nuclear Fusion High temp and pressure are used to combine light atoms to make heavier atoms Ex: Fuels the sun and stars & Hydrogen Bombs A heavy atom splits into two or more lighter nuclei Ex: Atomic Bombs & Nuclear reactors Release huge amounts of energy Produce nuclear waste

Comparing Fission and Fusion http://media-1.web.britannica.com/eb-media/03/72203-035-4D92BDBC.jpg

Atomic Structure Review Sheet Complete the atomic structure review sheet at your desk. Mr. Klotz has an answer key that will be posted on his website

Exit Ticket Write down three questions that could be on the exam tomorrow. One in each category Atomic theory Scientists Radioactivity Trade with a partner and have them respond Check their answers