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Across 3. A metal found in group one of the periodic table 5. Thermal ..................... is a reaction in which a substance is broken down using heat energy 8. A letter code for the elements of the periodic table 11. The .......... test is used to discover what metal is in a compound as it produces colour when in the Bunsen burner 14. A reaction that gets warmer becasue it gives off heat energy from the surroundings 15. A neutral particle found in the nucleus of an atom 16. A solid mixed evenly with a liquid with out dissolving 20. A reaction that gets colder because it takes in heat energy from the surroundings 22. A compound or a metal that is naturally occuring and which is extracted or mined 25. A reaction to which water is added 26. The delivery tube method used to collect more dense gases than air 28. The transition metals iron, cobalt and nickel are this 30. Metals like zinc in this large group in the middle of the periodic table 31. A reaction to which oxygen is added 33. The acid found in lemons and oranges 34. Iron oxide corrosion is called this 35. Substances that dissolve are called this

Down 1. Compounds that contain carbon, hydrogen and oxygen are called this 2. A mixture of metals 4. A chemical reaction where a more reactive metal pushes out a less reactive metal 5. When you mix a substance with water to make it less concentrated 6. The scientific name for burning 7. An ..................... agent is a chemical that causes oxidation to happen 9. A susbatnce that is able to be burnt 10. The insoluble solid part formed during a precipitation reaction 12. The delivery tube method used to collect less dense gases than air 13. A reaction where oxygen is taken away from a substance 17. A negatively charged particle that surrounds the nucleus of an atom 18. Group 8 of the periodic table are the noble or .............. gases 19. A substance that has had its water removed 21. An element found in group seven of the periodic table including chlorine 23. A substance containing two or more elements 24. The positiviely charged particle in the nucleus of an atom 27. Substances that will not dissolve 29. The ................. number is the number of protons in the nucleus of an atom 32. A substance that is poisonous is also called this