"Oxidation state support was introduced in Kalzium 4.7. Not all Atoms have currently a value in the elements.xml file. The task would be to add all missing oxidation states data into the elements.xml. Existing data should also be reviewed. Use wikipedia to get the data of each atom.
Expected results: Send the finished elements.xml to the mentor
Prerequisites: You should not be afraid of xml. Chemistry knowledge is not needed
Files location: https://projects.kde.org/projects/kde/kdeedu/kalzium/repository/revisions/master/changes/libscience/data/elements.xml"