Periodic Table Crossword!

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