A classroom activity is presented in which students are challenged to find matches between the United States two-letter postal abbreviations for states and chemical element symbols. The activity aims to lessen negative apprehensions students might have when the periodic table of the elements with its more than 100 combinations of letters is first introduced. Teachers might use the activity to convey knowledge about specific areas of the periodic table, such as metals and nonmetals, main group and transition elements, or stable and radioactive elements. Material for a take-home version of the activity is provided and an adaptation for other countries is suggested.
Supplement
Interactive presentation slide to conduct the activity in the classroom (formatted for Microsoft Office PowerPoint 2003 and Microsoft Office PowerPoint 2007); One-page version (PDF) of the activity for individual challenge; List of element symbols matching two-letter combinations on German license plates
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