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Write the answers to the questions in the grid. One vertical column will be the chemical name of an over-the-counter medication.ÌýPrintable hidden chemical puzzle

Enter your students’ correct solutions into a draw on or before October 1, 2019. The prize is a Chem Time Clock to be awarded to the teacher and is donated by . Please have your students print their full name clearly and send your students’ solutions to: Chem 13 News, Hidden chemical puzzle, Department of Chemistry, University of À¶Ý®ÊÓƵ, À¶Ý®ÊÓƵ, Ontario, N2L 3G1, Canada; or emailÌý³Ü²õ.Ìý
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Clues

1. Anti-knocking agent added to gasoline until 1996 – (CH₃CH₂)₄Pb
2. O, S, Se, Te and PoÌý
3. She won Nobel prizes in chemistry and physics
4. Fruit sugar – C₆H₁₂O₆Ìý
5. Oil of wintergreen – C₈H₈O₃Ìý
6. Element reacts with compound to yield a different element and compound
7. Used to treat skin ailments – KMnO₄Ìý
8. Fuel for barbecue grills – C₃H₈Ìý
9. Petroleum refined for use in the internal combustion engine
10. Father of chemistry (last name only)
11. Main component of sand or glass – SiO₂Ìý
12. Compound that carries genetic information (DNA)
13. Relation between pressure, volume, Kelvin temperature and the number of moles (PV=nRT)
14. Double ringed nucleotide in DNA
15. A fungicide formerly used as a seed treatment – C₆Cl₆Ìý
16. Inert element in orange-red electrified glass tubes
17. Reaction in which electrons are transferred from one atom to another (redox)
18. Radioactive alkali metal
19. In 1863 J. Wilbrand first prepared this explosive (TNT)
20. Substance used as a moth repellent and deodorizer (PDCB) – C₆H₄Cl₂ Ìý Ìý
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