Periodic Table Crossword

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Across
  1. 2. Most reactive metals, found in Group 1A
  2. 5. particle in the nucleus that has no charge
  3. 8. subatomic particle with a positive charge
  4. 10. number of protons in an element
  5. 11. Group of gases that don't form compounds because they don't share electrons
  6. 13. Arrangement of elements showing a repeating pattern
  7. 15. When one element combines and reacts with another
  8. 17. metals that are harder and denser and melt at high temperatures
  9. 18. Elements that have some properties of metals and nonmetals
  10. 19. subatomic particle with a negative charge
Down
  1. 1. Elements that are very reactive with hydrogen and can form salts
  2. 3. substances that can conduct electricity under some conditions
  3. 4. The number of protons and neutrons in a element
  4. 6. shiny and reflective
  5. 7. columns in the periodic table ( famalies)
  6. 9. elements that lack the properties of a metal
  7. 12. elements that are good conductors and are often shiny and bendable
  8. 14. can be hammered or rolled in the flat sheets or shapes
  9. 16. rows in the periodic table