1. Williamsburg High School for Architecture and Design Mr. Quinn and Ms. Tom 10/10/13

2. The stability of an isotope is based on its... ●What force pushes a nucleus apart? ●What force holds a nucleus together?

3. Which symbol represents an isotope of carbon? What is an isotope? How do we write isotopes? What number always identifies the element?

4. Chlorine-37 can be represented as... What is the atomic number of Cl? What is the atomic mass of this isotope? How do we write that?

5. Which particle has the greatest mass?

6. Which list of nuclear emissions is arranged in order from the least penetrating power to the greatest penetrating power?

7. Which type of radiation is identical in mass and charge to a helium nucleus?

8. The change that is undergone by an atom of an element made radioactive by bombardment with high-energy protons is called... Check the wording! What do all natural transmutations have in common?

9. The half-life of this isotope is... What is the definition of half-life?

10. Which equation represents natural transmutation? 1.Which equations are for nuclear transmutation? 2.What do all natural transmutations have in common?

11. Which particle is represented by X?

12. The half-life of an isotope is 20 years. After 60 years, what fraction of the original amount remains? Show your work step- by-step.