Periodic Table Crossword

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Across
  1. 5. Has atomic number 5
  2. 6. Has atomic number 9
  3. 8. Variants of a particular chemical element which differ in neutron number
  4. 9. Has atomic number 12
  5. 11. Has atomic number 4
  6. 13. Has atomic number 15
  7. 16. Has atomic number 11
  8. 18. Has atomic number 3
  9. 19. usually located on the right of the periodic table.
  10. 20. Includes Boron, Silicon, Germanium, and Arsenic.
Down
  1. 1. Has atomic number 6
  2. 2. Has atomic number 10
  3. 3. Has atomic number 17
  4. 4. Has atomic number 79
  5. 7. each of more than one hundred substances that cannot be chemically put into simpler substances
  6. 10. Includes Helium, Neon, and Krypton
  7. 12. a table of the chemical elements arranged in order of atomic numbers
  8. 14. Has atomic number 1
  9. 15. Has atomic number 78
  10. 17. usually located on the left of the periodic table