nuclear chemistry notes

nuclear chemistry notes - Chapter 28 Nuclear Chemistry...

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Unformatted text preview: Chapter 28- Nuclear Chemistry Notes-Most nuclei (1250 of 1500) are radioactive- the nucleus undergoes a nucler reaction and releases radiation (particles or rays of energy) and become different nuclei-Nuclear reactions can’t be stopped or changed by temp, pressure, catalysts, concentration-radioactive nuclei are unstable, and by releasing radiation (decaying), they become more stable-elements <20 – most stable: protons=neutrons-elements near bottom – most stable: N=1.5P-elements >83 are radioactive-more P and N, more likely to be radioactive-alpha particle- not fast and doesn’t penetrate things; releases helium nucleus-beta particle- more penetrating; formed when a neutron decomposes; electron released-gamma radiation- just energy; not a particle-positron- opposite of beta particle- made when a proton changes into a neutron; releases a positive electron-nuclear fission- a large, unstable nucleus (U) splits into smaller nuclei; happens when a neutron hits the...
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