Across
- 3. What you get when you add protons and neutrons together
- 4. A chart that organizes elements
- 8. Makes up everything
- 9. Neutral charge, found in the nucleus in atoms
- 10. The subatomic particle on the outermost shell of an atom
Down
- 1. The number of protons
- 2. The substances that are produced after a chemical reaction
- 5. Negative charge, found on the outside of atoms
- 6. The substances that go into a chemical reaction
- 7. Positive charge, found in the nucleus in atoms