Science: Matter and Chemical Change

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