Chemical symbol is a simple quiz application consists of four selected three sections.Killing time, please use the students for a change.Please place your name in the chemical symbol is selected from the four questions.The problem is random questions.Elemental symbol 1 · (H) ~ 20 (Ca)- Middle school, high school 1.2 grade level?Elemental symbol 1 · (H) ~ 36 (kr)- The level college students!37 atomic symbol · (Rb) ~ 118 (Uno)The questions are too easy for people to -36!? The sign in front of each element has a atomic number.Section of the exam is 10 questions each random ?.? four selected issues is a concern.· File size light?· SD card can be saved!