1		2										3
		4				5									6			7
					8							9					10
	11																12
								13															14
							15
				16
17		18													19
								20					21							22
							23			24
	25														26						27
			28			29
			30									31				32
																			33

Across 2. petrol, bitumen and candle wax are all examples of ....... 5. the element that can make long complex molecules, essential for life 7. the latin name for gold 9. stomach acid 11. Isaac Newton was one - they were the "magicians" who preceded chemists 12. calcium and bromine make calcium ..... 13. it was called saltpeter - used in gunpowder 15. the principle about mass in chemical reactions 17. this person said that he discovered the philosopher's stone 19. if you burn an element in oxygen, you produce an ..... 22. only person to have won nobel prizes in both chemistry and physics 23. if you're not part of the solution, you're part of the ....... 25. magnesium and hydrochloric acid produce this gas 26. first discovered from 50 buckets of urine 30. group 1 metals 31. great chemist and physicist who was head of the Royal Institution 33. salts are this type of compound

Down 1. turning from a solid straight into a gas 3. the type of reaction that mixes an acid and an alkali to make a salt and water 4. the guy who produced the modern periodic table 6. element number 4 8. compounds of non-metals form these - so do some elements 10. a worrying greenhouse gas 14. element named after a famous scientist 16. quicksilver 18. you mix metals together to make these 20. woman who took the x-ray photos that helped solve the DNA structure 21. strange red compound thought to be an ingredient in the elixir of life 24. something that you add to a reaction to make it go faster 27. plants make it for us 28. a heavy radioactive noble gas 29. don't call it hydrogen hydroxide 32. the original sir humphrey - a famous chemist