Across
- 2. Substance that helps a chemical reaction to proceed quicker
- 6. Combination of symbols that represent a compound, it identifies the elements in a compound and the amount of each element
- 9. Solid to gas
- 12. A chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 13. Pure substance formed when two non-metals combine
- 15. Substance that greatly resists the flow of electricity
- 16. Catalyst involved in a chemical reactions in living thing
- 19. An experiment in which one or more products of a chemical reaction can escape
- 20. Smallest part of an element that is representative of that element
- 21. group of 17 elements in the periodic table. Most reactive non-metals
Down
- 1. A material that is made up of one substance
- 2. A change that occurs when 2 or more substances react to create a new substance
- 3. Characteristics that can be used to describe a substance
- 4. Horizontal row of elements in the periodic table
- 5. Describes the physical appearance and composition of a substance
- 6. Describes how a substance reacts with other other substances
- 7. Pure substance formed when at least one metal and non-metal combine
- 8. Chemical combination of two or more elements in a specific ratio
- 10. A material that electric charge can move through easily
- 11. New substance produced in a chemical reaction between reactants
- 13. Shiny, malleable, ductile, element that conducts electricity
- 14. The number of protons in a nucleus of one atom in an element
- 17. Anything that has mass and takes up space
- 18. The mass of one atom in an element, made up of protons, neutrons and electrons