Periodic Table Crossword!

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