Atoms and Elements Study Guide

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Across
  1. 4. the number of protons and electrons in an atom are ___ so the atom has no charge
  2. 6. subatomic particle with a negative charge
  3. 9. atoms with the same number of protons but different number of neutrons
  4. 10. the most common element in the universe
  5. 13. the change from a solid to a gas
  6. 16. made of 2 or more elements
  7. 17. subatomic particle with a positive charge
  8. 19. each column on the periodic table is called a __
  9. 20. state of matter with definite volume but no definite shape
  10. 21. the number of protons in an atom
  11. 22. a very hot mix of charged atoms, uncharged atoms, and electrons
  12. 25. the scientist who thought atoms were like raisins in a plum pudding
  13. 26. when you add heat, molecules move ___
Down
  1. 1. conduct heat and electricity well
  2. 2. the scientist who said negative charges must revolve around positive charges
  3. 3. a substance with only 1 kind of atom
  4. 5. state of matter with definite shape and volume
  5. 7. the temperature where a solid changes to a liquid
  6. 8. the scientist who said some of the atom's mass must be made of neutrons
  7. 11. state of matter with no definite volume or shape
  8. 12. smallest unit of an element that can still be identified
  9. 14. scientist who arranged the first periodic table
  10. 15. the temperature where a substance becomes a gas
  11. 18. subatomic particle with no charge
  12. 23. atoms bonded together
  13. 24. neutrons + protons in the nucleus