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NUCLEAR CHANGES

NUCLEAR CHANGES. What is Radioactivity?. What happens when an element undergoes radioactive decay ?. During radioactive decay an unstable nuclei of an isotope emits particles and releases energy , to become a stable isotope. “NUCLEAR”. To radiate means “to give off”.

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NUCLEAR CHANGES

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  1. NUCLEAR CHANGES What is Radioactivity?

  2. What happens when an element undergoes radioactive decay? • During radioactive decay an unstable nuclei of an isotopeemits particles and releases energy, to become a stable isotope. “NUCLEAR” To radiate means “to give off”

  3. http://www.ndt-ed.org/EducationResources/HighSchool/Radiography/stableunstableatoms.htmhttp://www.ndt-ed.org/EducationResources/HighSchool/Radiography/stableunstableatoms.htm UNSTABLE NUCLEI

  4. Isotopes of an element are atoms that have the same number of protons but different numbers of neutrons in their nuclei • http://www.efda.org/multimedia/downloads/animations/Hi-De-Tri.swf

  5. RADIATION Nuclear Radiation Electromagnetic Radiation Energy given off by an atom due to an acceleration of the atoms electrons • A release of energy and particles from the nucleus of an atom

  6. Materials undergoing radioactive decay are changing! • AND – Materials that get bombarded with nuclear radiation are affects

  7. There are 4 types of nuclear radiation • Alpha particles • Beta particles • Gamma rays • nuetrinos

  8. Positively charged Helium nuclei More massive than other nuclear radiation types The alpha particle

  9. The beta particle Travels farther through matter than the heavy alpha particle Fast moving electrons/positrons Can pass through paper Will be stopped by 3 mm of aluminum

  10. The gamma ray • High energy electromagnetic radiation

  11. Nuclear decay • Nuclear deacy causes changes in the nucleus of an atom

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