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Across 4. CIO2 5. AB+CD ---> CB+AD 6. A+BC --->B+AC 11. postively (+) charges ions 12. P1V1=P2V2 13. number of electron located at the outter energy level 16. Temperature unit that deals with +273 18. PV=nRT 19. located at the right side of the arrow in a chemical equation 21. a bond between between two metals 22. NH4 23. negatively charged ions 24. says an atom is happy(stable) when the valence shell contains a full 8 electrons

Down 1. P1V1/T1 = P2V2/T2 2. Atomsor groups of atoms with a + or - 3. :B. 7. a single compound (rectants) breaks down into 2 or more simpler substance 8. in a chemical reaction we have the same number of this on both sides 9. a bond between a metal and non-metal 10. A+B --> AB 11. a law with constant pressure 14. T 15. C2O4 17. CO3 20. unit of pressure