Chemisty Unit Review Crossword

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Across
  1. 2. substance consisting of atoms which all have the same atomic number
  2. 3. how much the element weighs
  3. 5. Gas has all valence electrons, doesn’t mix
  4. 7. substance that is formed as a result of a chemical reaction
  5. 9. carries no charge
  6. 12. center of atom, protons and neutrons
  7. 14. basic unit of everything in the universe, what everything is made of
  8. 15. outermost electron(s)
  9. 16. when atoms of differents elements combine
  10. 18. horizontal row in the periodic table
  11. 19. invented the Periodic Table
  12. 20. chemical reaction that makes it cold
  13. 24. shiny, solid, good conductor, malleable, ductile
  14. 25. can combine with atoms of the same element
Down
  1. 1. a substance that takes part in and undergoes change
  2. 4. helps you locate the element on the periodic table
  3. 6. chemical reaction that makes it hot
  4. 8. column of elements in the periodic table
  5. 10. number of atoms present before and after a reaction takes place is always the same
  6. 11. brittle, poor conductor, not malleable or ductile
  7. 13. carries no charge
  8. 17. In between metal and non-metal
  9. 21. space around nucleus of atom where the electrons are likely to be found
  10. 22. carries negative charge
  11. 23. the 2 letters that tell what the element is