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This guide explores the fundamental concepts of nuclear chemistry, focusing on the strong nuclear force that holds the nucleus together, overcoming the repulsion between protons. It discusses the electrostatic force that binds protons and electrons, maintaining atomic integrity. Learn about the causes of radioactivity, including isotopes like C-14, and the types of radioactive particles: alpha, beta, and gamma. We also cover specific cases like cobalt-60 and francium, the implications of nuclear equations for alpha and beta decay, and the differences between chemical and nuclear reactions.
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Strong nuclear force---holds the nucleus together (overcomes proton repulsion) • Electrostatic force—attractive force between protons and electrons (holds entire atom together)
2 reasons why something is radioactive? • Past atomic # 83 • An isotope (Ex: C—14)
3 radioactive particles • Alpha—a helium nucleus; least penetrating power • Beta—a high energy electron • Gamma---most penetrating; pure energy
1. Why is cobalt—60 radioactive? • 2. Why is Francium radioactive? • 3. What force holds the entire atom together? • 4. What force holds the nucleus together? • 5. Write the nuclear equation for the alpha decay of Polonium. • 6. Write the nuclear equation for the beta decay of Bk—249.
Pass the Ball—nuclear review • 1. Give 1 difference between chemical vs. nuclear reactions. • 2. Give another difference. • 3. Give 1 reason why something is radioactive. • 4. Give another reason for radioactivity. • 5. Name the 3 radioactive particles in order of increasing penetration. • 6. Which radioactive particle decreases atomic number by 2 and mass by 4? • 7. Which radioactive particle increases atomic number by 1 and does not change mass? • 8. Which force holds the atom’s nucleus together? • 9. Which force holds the entire atom together through the force of attraction between protons and electrons? • 10. What’s the difference between fission and fusion?