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Across 5. V1/T1=V2/T2 Law 7. A single compound breaks up into 2 or more simpler substances 13. Conduct electricity in water 15. Negatively charged ions 17. Bonds that start with Metal or NH4 18. Formed when atoms gain or lose electrons 20. Energy levels are broken down into 21. A diagram of a molecule showing how the valence electrons are arranged 22. Elements organized into groups and colums 23. Bonds that concist of 2 non metals 24. Positively charged ions

Down 1. Rule that atoms must follow to have 8 valence electrons 2. Model that shows electrons move in orbits around the nucleus 3. A single element replaces the ancestor element in a compund 4. The cations and ions of 2 different compunds switch placeses 6. 2 or more substances combined to form a single substance 8. A carbon based compund reacts with oxygen 9. P1/T1=P2/T2 Law 10. C + 273 degrees 11. P1V1=P2V2 Law 12. Ions sharing 3 electrons 14. Reaction that produces new substances 16. Ions sharing 2 electrons 18. PV=nRT 19. P1V1/T1=P2V2/T2 law