Chapter 6

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Across
  1. 5. Democritus named this particle
  2. 7. Neutral particle in the atom’s nucleus
  3. 8. A row on the periodic table
  4. 10. (3 words) Shows the numbers and locations of protons, neutrons and electrons in an atom
  5. 12. group 1 of the periodic table
  6. 13. Very reactive
  7. 14. Cannot be broken down into simpler chemical substance by any physical or chemical means
  8. 15. Located on the right of the staircase on the periodic table
  9. 17. The number of protons and neutrons in an atom’s nucleus
  10. 20. An abbreviation for a chemical element
Down
  1. 1. Positively charged particle in the atom's nucleus
  2. 2. Located along the staircase line
  3. 3. Any pure substance that is composed of two or more different elements that are chemically joined
  4. 4. The mass of an atom
  5. 6. a column with similar properties on the periodic table
  6. 9. Group 18 on the periodic table
  7. 11. (3 words) These metals are shiny and silvery but not as soft or reactive as alkali metals
  8. 16. Located at the top left corner of each element on the periodic table
  9. 18. An atom with the same number of protons but a different number of neutrons
  10. 19. Part of Thomson's experiment