Dissapointed

At first i loved this app and I was showing it off to my friends and family how everything is crisp and clear ... But then when I took it to science class to do some work I noticed that nowhere on this app is there the ion charge of the elements ... Its necessary to have on the periodic table. If i dont have the ion charge then I cant put together Na and Cl ( sodium and chlorine ) unless i have the ion charge to know that I need 2 chlorine atoms to make the sodium combine them otherwise it wont be stable. Once you put the ion charge on ALL the elements Ill bump up my rating to 5 stars.

P.S. I dont care how much memory it takes up ... I have the 64GB iPad so JUST GIVE ME THE ION CHARGE!!.

Grade 9 about The Elements by Theodore Gray