lesson 2 draft
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Lesson 2Radioactive Decay EquationsTeacher: Mr. GuerraC.C. Winn High School
By PresenterMedia.com
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•Nuclear Equations
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•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.
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•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 the reaction.
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•Nuclear Equations• A nuclear equation is a symbolic representation of a nuclear reaction using nuclide symbols.
– For example, the nuclide symbol for uranium-238 is
U23892
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•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.
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•Periodic Table of elements
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•Atomic Mass on the Periodic Table
11
Na22.99
Atomic Number
Symbol
Atomic Mass
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•Nuclear Equations
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•Question 1• What is the atomic and mass number in this chemical element? What is the name of this chemical?
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•Question 2