Periodic Table

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Across
  1. 4. periodic table shows all of the ______ in the universe
  2. 7. of both metals and non-metals
  3. 11. left side of the periodic table is more ____ than the right
  4. 13. type of elementary particle and a fundamental constituent of matter
  5. 16. mass of the item
  6. 17. mostly on the right side of the table
  7. 18. how many valence electrons are in the last layer
  8. 19. all the known elements in the universe
Down
  1. 1. First group are called _____ metals
  2. 2. electrons in the most outer layer is called _____ electrons
  3. 3. smallest component of a element
  4. 5. creator of the periodic table
  5. 6. symbol is O
  6. 8. how many shell the atom has
  7. 9. subatomic particle that is in the shells of the atom
  8. 10. mostly on the left side of the table
  9. 12. subatomic particle in the nucleus of a atom
  10. 14. the Atomic number from the Atomic weight to get the
  11. 15. show how many protons or electrons there are
  12. 20. middle of the periodic table is_______ metals