this application contains 3 classes:
-a periodic table 2018, with all the features of the elements just by a click the element you would like to know
a class of search for a particular element just in writing the name or the symbol or in writing the atomic name, for example H, h, hydrogen, Hydrogen or 1
-the 3rd class to calculate the degree of unsaturation ie Discover if the molecule contains double or triple bonds or contains cycles
- contains three languages: French, English and Arabic