Matter and Chemical C Crossword

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Across
  1. 2. chemical combination of two or more elements in a specific ratio
  2. 4. The most reactive nonmetals
  3. 8. Ability of a substance to conduct electricity or heat
  4. 9. A chemical reaction that releases heat
  5. 12. The most stable elements
  6. 13. A pure substance formed when two nonmetals combine
  7. 15. The most reactive metals
  8. 16. A reaction that takes place when two or more sb=ubstance react to form new subtances
  9. 19. substance that helps a chemical reaction proceed more quickly
  10. 20. atom that has become electrically charged because it has lost or gained electrons
  11. 21. pure substance that is made up of one atom
  12. 22. An element that has both metal and nonmetal properties
  13. 23. group 17 elements of the periodic table; the most reactive non-metals
Down
  1. 1. The neutral particle in the nucleus of an atom
  2. 3. A gas to a solid
  3. 5. negatively charged particle that orbits the nucleus of an atom
  4. 6. vertical column of elements in the periodic table of elements in the periodic table
  5. 7. heterogeneous mixture; mixture in which the different substances that make up the mixture are visible
  6. 10. an experiment in which one or more products of a chemical reaction can escape
  7. 11. positively charged particle in the nucleus of an atom
  8. 14. Positively charged centre of an atom
  9. 16. An expirement in which all reactants and all products of a chemical reaction are accounted for
  10. 17. Cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated out from the other substance
  11. 18. A chemical reaction that absorbs energy