Chemix App for Android
'Learning chemistry has never been so fun!
Play among three game models:
Quiz - The hardest quiz you ever played! Unless you have a chemistry book or periodic table on your side.
Match - Fill the test tubes with the right amount of elements to create the formula! Seems legit.
Find it - Slide your finger on the screen, like Michael Jackson’s moonwalker, and find the correct elements.'
This is a free app