This application supports memorizing chemical element symbols from atomic number 1 hydrogen (H) to atomic number 20 calcium (Ca). In list mode, displays the element symbol to be memorized. Flashcards can be tapped to display the following chemical element symbols to support memorization tasks. Press the button on the upper left of the screen to display the previous element symbol. With the AUTO button on the upper right, the element symbol can be displayed at intervals of 2 seconds (SLOW) or 1