Classes of Chemicals

This crossword was created by dr john with EclipseCrossword by Green Eclipse Software — www.eclipsecrossword.com

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Across 3. The simplest type of chemical substance 4. Only functional group is an OH 6. Product of reacting an acid and a base. 7. helium, neon, etc 9. C2H2 is the simplest example of this class of compunds 13. The opposite of an acid 14. The group of metals in the middle of the periodic table 18. Smelly, they have an NH2 group 20. The thing you are using just now 23. When you burn things they produce this class of compund 25. They have double bonds which are not normal 27. Has a C=C 28. Not a single substance 31. Includes several classes of compunds, all just containing C and H 32. They are hard, shiny and conduct electricity well

Down 1. It is corrosive, and has an OH group. 2. Room where you carry out chemsitry experiments 5. It turns red litmus blue but has a C=O group as well 6. Produced by reacting H2SO4 with metals 8. Salts formed from HNO3 10. Carbon, hydrogen and oxygen make these ones (glucose is an example) 11. Releases CO2 when treated with HCl 12. Important in synthesis, it has elements from Group 7 as its functional group. 15. Contains a C=O on the first carbon 16. Many rocks are made from this type of compound. 17. Where you sleep 19. When dissolved in water this large class of compunds can conduct electricity 21. A really big molecule, made from lots of little ones. 22. The building blocks of proteins 24. There is a C=O which is not on the first carbon 26. The simplest type of organic compound. 29. The sort of rock from which you can extract a metal. 30. It turns blue litmus red