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Across 3. AB+CD=CB+AD 6. A+B=B+AC 11. A+O2(g)=CO2(g)+H2O(1) 14. between nonmetals , atoms share electrons 16. atoms are happy when they have valence electrons 17. (P1V)T1=(P2V2)T2 18. mathematical formulas that allow us to predict gas behavior 19. PV=nRT 20. atoms or groups of atoms with charge ( _ or + ) 22. betwen nonmetals and metals.Atoms transfer electron from one a other 23. A+B=AB 24. between metals and nnmetals when atoms transfer electrons to obey 25. electrons move indefinite orbits around the nucleus

Down 1. C=273K 2. negatively chage 4. each orbits is an energy level 5. there are 4 types of sublevels which are S,P,D and F 7. are way to indicate electrons 8. positively charge 9. electrons in out most principal energy level 10. an atom with a charge 12. P1V1=P2V2 13. AB=A+B 14. V1T1=V2T2 15. P1T1=P2T2 17. when a pair of electron shared between 2 atoms in order to follow the octet rule also between 2 nonmetals 21. contains 7 valence electrons