Across
- 1. unable to cut
- 4. defines each element
- 7. smallest particle
- 8. form of chemical bonding
- 10. bonded atoms
- 11. initial atomic theory
- 12. found in nucleus
Down
- 2. protons plus neutrons
- 3. smaller mass than neutrons and protons
- 5. negative charge
- 6. bonding between non-metal and a metal atom
- 8. two or more different types of atoms
- 9. electrons determine atom stability or reactivity