Kalzium is your digital replacement for the periodic table on paper. It is a program that visualizes the Periodic Table of Elements (PSE) and includes basic information about all common elements in the PSE. It has a gained much more functions over time.


  • versatile overview of all important data from the elements like melting points, electron affinity, electronegativity, electron configuration, radii, mass, ionisation energy
  • tool to visualize the spectral lines of each element
  • different colored views of the PSE: separation of the different blocks, Year simulator, Temperature simulator
  • Molecular weight calculator
  • an Isotope table
  • 3D molecule editor, with a load and save functionality
  • an equation solver for stoichiometric problems
  • filetype conversion for different types of chemical programs
  • tool to produce a comprehensive list of all Risk_and_Safety_Statements

Developed By


Thanks To:

  • Pino Toscano
    Large code contributions; resident guru helping the other developers
  • Benoit Jacob
    Base work on the molecular viewer, mentored Marcus during his SoC
  • Marcus Hanwell
    SoC on the molecular viewer and libavogadro porting/integration
  • Kashyap R Puranik
    SoC on the calculator widget and a few smaller improvements
  • Thomas Nagy
    EqChem, the equation solver
  • Inge Wallin
    Code cleaning, parser for the molecule weight calculator, and a lot of smaller improvements
  • Anne-Marie Mahfouf
    A lot of small things and the documentation
  • Johannes Simon
    Code and documentation contributions to the equation solver and molecular viewer
  • Jarle Akselsen
    Many beautiful element icons
  • Noémie Scherer
    Many beautiful element icons, too!
  • Danny Allen
    Several icons
  • Lee Olson
    Several icons in the information dialog
  • Jörg Buchwald
    Contributed most isotope information
  • Marco Martin
    Some icons and inspiration for others
  • Daniel Haas
    The design of the information dialog
  • Brian Beck
    The orbits icon
  • Paulo Cattai
    New interface design and usability improvements
  • Danilo Balzaque
    New interface design and usability improvements
  • Roberto Cunha
    New interface design and usability improvements
  • Tadeu Araujo
    New interface design and usability improvements
  • Tiago Porangaba
    New interface design and usability improvements


Kalzium is distributed under the terms of the GNU General Public License (GPL), Version 2.