Chemistry Everyday for Everyone
Our Puzzle-ing Past This puzzle first appeared in the Journal 50 years ago: From Bertil Englund, a teacher in a Swedish school, we received the following “puzzle”, devised by a student, Pär Bergvall, of Sysslomansgatan 15, Uppsala, Sweden: How many chemical formulas can you put together if you go in every possible direction in the cross-word puzzle…? You must not skip any squares, but you may begin every formula wherever you wish (e.g., D3, D2, E2 becomes HCN and B1, C2 becomes H2S). In the squares A1 and A5, you may fill in two symbols which you choose yourself.
Reproduced from J. Chem. Educ. 1948, 25, 233.
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Journal of Chemical Education • Vol. 75 No. 4 April 1998 • JChemEd.chem.wisc.edu
