Nuclear Chemistry

Nuclear Chemistry - • Medium penetrating power –...

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Nuclear Chemistry Nuclear Reactions and Radioactive Decay 1.)  Nuclear Reactions • Change in an atom’s nucleus • Three ways the nucleus can change: –Gain or lose protons –Gain or lose neutrons –Gain or lose both 2.)  Radioactivity • Process of emitting radiation • Causes one atom to change  to another kind of atom – Some nuclei are unstable and  they become more stable when they  lose energy – They lose energy by  changing the nucleus 3.)  Alpha Particles • Contain two protons and two neutrons • Very low penetrating power – stopped by a piece of paper • Written as:  _ or He or 4_ 4.)  Beta Particles • High speed electrons
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Unformatted text preview: • Medium penetrating power – stopped by thin metal foil • Released when a neutron decays into a proton and an electron • Written as _ or e or 0_ 5.) Gamma Rays • High speed radiation without mass or charge • Strong penetrating power – partially stopped by thick lead and/or thick concrete • Causes tissue damage • Represented by _ 6.) Nuclear Stability • Why are some atoms stable and others are not? – Protons are repelling each other –Atoms with too many or too few neutrons compared to the number of protons are unstable...
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This note was uploaded on 06/18/2011 for the course CHEM 1401 taught by Professor Indian during the Spring '09 term at HCCS.

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Nuclear Chemistry - • Medium penetrating power –...

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