Atomic Bonding

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Across
  1. 6. positively charged center
  2. 8. Elements want 8 in their outer shell
  3. 10. Basic chemical unit
  4. 12. Chemical reactions that release heat or light
  5. 13. two or more chemically bound atoms
  6. 14. Second generation of quarks
  7. 15. Electrons in the outer shell
  8. 19. Third generation of quarks
  9. 21. First generation of quarks
Down
  1. 1. Holds quarks together
  2. 2. Gain's or losses electrons
  3. 3. Made of one substance
  4. 4. Negative charge
  5. 5. Chemical reaction that makes the air cold around it
  6. 7. Shares electrons
  7. 9. Process of removing electrons from an atom to from ions
  8. 11. Many free electrons
  9. 16. no charge
  10. 17. Made of more than one substance
  11. 18. Positive charge
  12. 20. Particles that make up Neutrons and Electrons