Bernard's Periodic Table Crossword

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Across
  1. 2. Positively charged particle in the nucleus of an atom
  2. 4. The number of protons in the nucleus of an atom of an element
  3. 7. A subatomic particle that is neutral and that is found in the nucleus of an atom
  4. 8. the ease and speed with which an element combines or reacts with other elements and compounds
  5. 10. very reactive, not found alone in nature, react violently with water
  6. 15. Found along the 'staircase'. Have properties of both metals and nonmetals
  7. 16. pure substance that consists entirely of one type of atom
  8. 17. able to be hammered into thin sheets
  9. 18. A tiny, negatively charged particle that moves around the nucleus of an atom.
Down
  1. 1. horizontal rows on the periodic table
  2. 3. brittle , dull, poor conductors of heat and electricity
  3. 4. a mixture of a metal with at least one other element- strengthens the structure
  4. 5. the ability of an object to transfer heat or electricity to another object
  5. 6. discovered the electron
  6. 9. The total number of protons and neutrons in an atom's nucleus
  7. 10. the period below lanthanides, very unstable
  8. 11. the smallest unit of an element that maintains the properties of that element
  9. 12. shiny, malleable, ductile and good conductors
  10. 13. tops vertical columns on the periodic table that have common properties
  11. 14. can be pulled into long wires