From the Store description:
Elements: The Periodic Table provides comprehensive and useful information about the chemical elements all in one place. Click on an element to know more about the properties, history, name origin, images, applications, hazards and electron shell diagram of each element.
As usual, a walkthrough is a good way to show off what 'Elements: The Periodic Table' has to offer:
A swipeable, hyperlinked graphical table is the perfect way in, just swipe and tap and browse to your heart's content. Of, if you can't find the element you want, use the alphabetic index (right), accessed from the toolbar.
It's when you get into each element that you start to realise the depth of information, right down to a graphical electron table and a wealth of other data (mainly of interest to chemists, this is the crossover between physics and chemistry); (right) the panorama panes of Windows Phone are used to super effects, going from properties to history to application to images and more...
An example of the depth of data, here on an element which you've probably never heard of but which was discovered long enough ago that everything is known about it - and (right) it's used in flashbubs and nuclear reactors. Who knew?!
Images of each element aren't trivial, given their nature, but the app has a good try anyway!
You can grab Periodic Table here in the Store. It's free to download and with just a small in-app-purchase to remove the initial ads. Highly recommended, it's the perfect reference application.