Define a chemical name

The program is designed to help improve understanding and learning of chemistry leements and its formulas.
The user can create formulas or element item by typing them in the appropriate field, select their complexity, and add a favorite. The user can also see the list of all added formulas, the favorite formulas will be highlighted in yellow
After creating 5 formulas or elements items, the user is able to use the test mode. On this screen, he sees a one formula or element item and few formulas names, and he needs to find a properly answer.