1							2		3													4
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	6														7									8
9
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	13
					14		15															16		17
18													19
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23
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26
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							34

Across 3. these react with acid to form hydrogen gas 6. a chemical bond formed when electrons are shared between two atoms 7. an atomic particle with a mass of one and a positive charge 8. formula for hydrochloric acid 9. manganese dioxide catalyst reacts with this to make oxygen gas in the lab 10. gas that relights a glowing splint 13. the colour of coper metal 18. the movement of particles from an area of high concentration to one of low concentration 22. this is what turns limewater cloudy 23. these atomic particles have negligible mass 24. where protons and neutrons are found 26. the colour of copper sulfate 28. gas that turns limewater cloudy 31. describes intermolecular attractions between simple molecules like chlorine and giant structures like graphite. 32. A result is this if the experiment has been repeated and the reliable results have been averaged 34. An explosive gas

Down 1. a precious stone with a giant structure 2. formed when hydrogen chloride gas dissolves in water 3. describes a solid becoming a liquid 4. this is what is formed when excess carbon dioxide is passed through limewater. 5. A gas does this when it cools to a liquid 7. A result is this if given with more decimal places 8. formula for sulfuric acid 11. carbon dioxide is responsible for this environmental problem 12. chlorine gas has this structure 14. when bonds are made energy is ___________ when the toms combine chemically. 15. the number that identifies an element on the Periodic Table 16. these metal ---------------- react with acid to form carbon dioxide gas 17. A result that veers from the best fit line 19. chemical name for sand 20. formed when polluting nitrogen oxides dissolve in water 21. A result is this if it has been repeated to check the results collected. 25. between ammonia and hydrogen chloride gas which diffuses fastest. 27. a type of chemical bond that forms when a metal donates/transfers an electron to a non-metal. 29. silicon dioxide forms this number of bonds 30. the colour of copper oxide 33. oxygen forms this number of bonds