Lesson 2 draft

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Lesson 2 draft

  1. 1. Lesson 2Radioactive Decay EquationsTeacher: Mr. GuerraC.C. Winn High School By PresenterMedia.com
  2. 2. •Nuclear Equations
  3. 3. •Nuclear Chemistry• In this chapter we will look at nuclear reactions. –Radioactive decay is the process in which a nucleus spontaneously disintegrates, giving off radiation.
  4. 4. •Nuclear EquationsIn nuclear equations, we balance nucleons(protons and neutrons). The atomic number(number of protons) and the mass number(number of nucleons) are conserved during thereaction.
  5. 5. •Nuclear Equations•Anuclear equation is a symbolicrepresentation of a nuclear reactionusing nuclide symbols. – For example, the nuclide symbol for uranium-238 is 238 92 U
  6. 6. •The Nucleus• Remember that the nucleus is comprised of the two nucleons, protons and neutrons.• The number of protons is the atomic number.• The number of protons and neutrons together is effectively the mass of the atom.
  7. 7. •Periodic Table of elements
  8. 8. •Atomic Mass on the PeriodicTable Atomic Number 11 Symbol Na Atomic Mass 22.99
  9. 9. •Nuclear Equations
  10. 10. •Question 1• What is the atomic and mass number inthis chemical element? What is thename of this chemical?
  11. 11. •Question 2

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