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Across 1. the reactant in a chemical reaction that remains when a reaction stops 4. Represents the average relative mass of all the naturally occurring isotopes of that element 6. He proposed the Nuclear Model for atoms 7. a positive charged ion 9. bonds within the molecule 12. concerning gasses: volume increases as temperature________ 13. a reaction that gives off heat 17. substance dissolved into the solution 19. homogeneous mixture of solute in a solvent 21. THe father of modern chemistry 23. a pure substance 24. the solid matter in a solution 25. PV=PV

Down 2. STP stands for 3. mass is conserved in a chemical reaction 5. the prediction of how much of one substance will react or be produced in a chemical reaction 8. a gas at a hugh temperature 10. volume of solute / volume of solvent 11. one certain digit plus one uncertain (estimated) digit 14. equal volumes of any gas (at same temp. and pressure) contain equal umber of molecules 15. the solid matter in a solution 16. the reactant in a chemical reaction that limits the amount of product that can be formed 18. and observation that involves measurements and numbers 20. the solutes in a solution that conduct electricity 22. loss of electrons