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