Periodic Table Big chemistry quiz is for android 1.6 and higher.You can change tests questions from menu MODE and press NEXT button for new question.If You will click on the question, you will get offline help bya dialog and from WIKIPEDIA if You will do click on button WIKI HELP.You can do a test from:Atomic symbolsAtomic weight Atomic numberYear of discoverygroup of elementMelting pointElectron configuration