This one is a TODO list who will be able to change depending on the different versions and other things.There isn't an order in the preference.

* Add images of elements  (as Kalzium).

* Add images of the electronic configuration (as Kalzium).
 
* Add mass calculator (as Kalzium).

* Add number of the groups.

* Add more properties.

* Add graphs for properties (as Kalzium).

* Write a setup.py or Makefile.

* Add tables of potentials of reduction.

* Add graphs of potentials of reduction.

* Add spanish translation and others translation (with help).

