For an element the responses become increasingly specific and involve its properties. The games are entirely about chemistry. There are no distractions such as rockets to be shot down or aliens to be massacred. The games are played using an abbreviated 72-element periodic table. Elements must be selected from the table on the screen, providing psychomotor stimulus to embed a mental map of the periodic table.
Several options are available to players.
Players may choose from up to seven lists of formulas, at the option of the instructor. The chosen convention is used in all descriptions of the elements. A scoreboard shows histograms of all games played as well as the top scorers and their scores for each list. There is an interactive periodic table, where selection of an element calls up a brief description of its chemistry. The properties described are those used in the feedback.