Periodic Table Crossword

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