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Across 6. smaller energy levels of an atom 10. a unit of measure for the mass of gas 11. the temperature at which something melts 12. v1t1=p2t2 14. a+bc=b+ac 15. used to measure volume 18. the group of metals in the middle of the periodiv table 19. p1v1=p2v2 21. a substance formed in a chemical reaction 22. v1/t1=v2/t2 23. the unit of the measurement of of how hot or cold something is 24. a+02(g)=c02(g)+h20(1) 25. pv=nrt

Down 1. ab+cd=cb+ad 2. p1v1/t1=p2v2/t2 3. c+273 4. a starting substance in chemical bonds in product reactants 5. on the periodic table 7. ab=a+b 8. anything to the right of the staircase on the periodic table 9. a+b=ab 13. a unit of pressure 16. anything left of the staircase on the periodic table 17. a measurement of the force of the gas 20. a model of molecular motion used to explain the properties of gases