Across
- 2. a solid formed in a solution
- 4. substance that slows or stops a chemical reaction
- 7. electrons on the outermost energy level
- 9. forms when two atoms are sharing electrons
- 10. states that energy cannot be created or destroyed
- 13. the amount of electrons that will fit on the first energy level
- 15. a process in which one or more substances undergoes a change to make something new
- 16. is determined by the number of protons in an atom
- 17. charged particles that form from chemical reactions
- 18. uses chemical symbols and formulas to describe a chemical reaction
Down
- 1. reaction where energy is given off
- 2. substances formed in a chemical reaction
- 3. force that holds two atoms together
- 5. minimum amount of energy needed to start a reaction
- 6. states that mass can not be created or destroyed
- 8. substance that speeds up a reaction
- 11. reaction where energy is absorbed
- 12. starting material in a chemical reaction
- 14. shorthand way to use chemical symbols and numbers