Check chemical formulas

The program will help you learn and test your knowledge of chemical formulas.
The program contains the following functions:

On the "CHECKING" screen:
You will be offered a random formula and 4 variants of its name. One option is correct. You must specify which of these options is correct.
When the test is complete, the result will be displayed.

On the "LIST Formulas" screen:
You can see a list of formulas and their names. You can also select favorites. This screen also includes the function to search, edit an entry and add a new entry.

On the "SETING" screen:
Here you can configure:
- selection options: use only selected records, not selected records or all records for testing.
- specify the number of tasks that will be provided to the user during testing.
- set the level of complexity of tasks.