Periodic Table Crossword!

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Across
  1. 2. Bond between metals and nonmetal
  2. 4. A small, positively charged particle of matter found in the atoms of all elements
  3. 7. Last name of scientist that named Carbon
  4. 8. Last name of scientist that named Neon
  5. 11. Elements that are shiny, good conductors, and found on the left side of the periodic table
  6. 12. Bond between nonmetals
  7. 14. The electrons on the outer orbital are called _________ electrons
  8. 16. Rows across on the periodic table
  9. 17. The smallest particle of an element that retains the elements properties
  10. 19. An atom with charge
  11. 20. Atoms of the same element that have a different number of neutrons
  12. 21. Last name of scientist that distinguished Hydrogen
Down
  1. 1. Columns (up/down) on the periodic table
  2. 3. Element that are dull,brittle and often a gas a room temperature
  3. 5. Number of protons plus number of neutrons is Atomic ____
  4. 6. The number of protons an atom has is Atomic ______
  5. 9. Last name of scientist that named Lithium
  6. 10. Last name of scientist that named Potassium
  7. 13. A particle with a negative charge that is found in all atoms.
  8. 15. An uncharged atomic particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
  9. 18. Last name of scientist that distinguished Helium