Things to think about:
1. What exactly *is* charge? How do we think of it? How does this relate to protons and electrons, etc.?
2. Explain the electrostatics demonstrations from class.
3. Why is it that electrons are the easiest particles to manipulate?
4. What does atomic number (Hydrogen = 1, Helium = 2, etc.) mean?
5. What is the most common element, and why?
6. What are quarks?
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