Science: Matter and Chemical Change

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Across
  1. 1. the rows in the Periodic Table of Elements
  2. 7. the 18 columns on the Periodic Table of Elements
  3. 9. ______ systems is an experiment in which reactants and products can not escape
  4. 11. neutral particles
  5. 13. occurs when oxygen reacts to another substance to form a new substance and releases energy
  6. 14. occurs when oxygen reacts with metal, a chemical reaction in which the metal is decomposed
  7. 15. an atom or group of atoms that become electrically charges because it has lost or gained electrons
  8. 16. compound formed when 2 non-metals combine
  9. 18. Workplace Hazardous Material Information System
  10. 19. substance that strongly resists the flow of electricity
  11. 20. the mass of one of an element
  12. 21. most reactive of the metals
  13. 23. published by Andreas Libau in 1597, it describes the achievements of alchemists
  14. 24. substances that helps reaction proceed faster
  15. 25. a pure substance that cannot be broken down into other substances
Down
  1. 2. represents the number of atoms
  2. 3. has the element symbol Br
  3. 4. positively charged particles
  4. 5. the Law of ________ of Mass
  5. 6. experimented with the behaviour of gases
  6. 8. characteristics that can be used to describe a substance
  7. 10. stated each type of material was made up of a different type of atomos
  8. 12. a chemical reaction that takes place in the cells of your body
  9. 17. Father of Modern Chemistry
  10. 21. supported the idea that everything was made up of the 4 elements
  11. 22. organic catalysts