Across
- 3. negative
- 5. found in nucleus, no charge
- 6. vertical on periodic table
- 7. group pf electrons
- 9. contains protons and neutrons
- 10. undergoes change during a reaction
- 11. matter
Down
- 1. electron located outside nucle
- 2. formed from chemical reactions
- 4. positive charge, found in nucleus
- 8. horizontal on periodic table