This is a Share/Share/Trade activity that gets students out of their seats as they study important vocabulary and concepts from electron configuration and periodic trends. Students take turns holding up the flash cards with a partner. Once each partner has provided a definition for the term on the other's card, they trade and switch groupings. This is repeated for several minutes until students have studied most or all of the vocabulary terms. Print the cards on card stock, fold and glue, then cut. Laminate if desired. Reusable for years.