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