Matter and Atomic theory

123456789101112131415161718192021
Across
  1. 5. ...electronic configuration
  2. 6. fourth period, group two
  3. 10. 2,8,18,2
  4. 11. basic building block of matter
  5. 12. like a dictionary for chemists
  6. 13. between solid and gas
  7. 15. changing from a solid to a liquid
  8. 17. 'split' the atom
  9. 18. mistake with atomic number
  10. 20. in fixed proportion
  11. 21. low kinetic energy
Down
  1. 1. ...number
  2. 2. abundant element in the universe
  3. 3. aurum
  4. 4. varying substances
  5. 7. Cf
  6. 8. ...atomic mass
  7. 9. outer most electrons
  8. 12. neutral electronic configuration of 2,8,5
  9. 14. anion with electronic configuration of 2,8,8
  10. 16. large spacing between particles
  11. 19. turning into a gas