Across
- 3. this notation represents atoms
- 6. an atom with an atomic number of three
- 7. substance which speeds up the reaction
- 10. increase this to make the reaction go faster
- 11. the atomic number
- 13. going across the Periodic Table
- 14. unreactive group of non-metals
- 16. what happens to the concentration of reactants over time
- 19. group seven
- 20. decrease this to slow the reaction down
- 22. these metals are very reactive with water
Down
- 1. sign of a chemical reaction
- 2. a new ________ is always made during a chemical reaction
- 4. this type of reaction releases energy to the surroundings
- 5. atom with an atomic number of seven
- 8. the most accurate method of measuring a gas
- 9. substance made up of only one type of atom
- 12. the line this way represents a reaction at its fastest
- 13. melting chocolate is an example of this type of change
- 15. this type of reaction takes in energy from the surroundings
- 17. the charge on an atom
- 18. this number is equal to the number of protons and neutrons
- 21. equal to the number of protons