Merck PTE 4‏+

The Merck PSE App is the ultimate tool for every friend of chemistry – whether pupil or teacher, university student or professor, amateur or expert, hobbyist or technician. Our app is the must-have of digital periodic tables. Get informed with our mobile reference work, any time, with ease, offline and in detail, in the usual straightforward, user-friendly way.

Download now free of charge and start experimenting.

New features in the latest version:
- Additional translations: Chinese (simplified), Portuguese, and Russian.
- Users can now change the language directly in the app
- New function for direct comparison of two elements
- A separate keypad for the molar mass calculator makes formulas easier to enter
- Headline and breadcrumbs added for improved orientation
- Filtering option and optimized usability for the ranking list of properties
- Update of element master data
- Update to current operating system versions
- Improved touch support for diagrams
- Museum mode

All existing features:
- All important information about the elements: atomic number, valence electrons, oxidation state, electronegativity according to Allred-Rochow and Pauling, atomic mass, boiling point, melting point, atomic radius, density, history, discoverer, classification, crystalline structure type, electron configuration, ionization energy, isotopic composition, state of matter, hardness according to Mohs, basic state, oxidation numbers, percentage of mass in Earth’s crust, year of discovery, half-life, and much more.
- Visualized element properties: atomic radius, atomic radius graphic, electronegativity (according to Allred-Rochow and Pauling), ionization energy, relative atomic mass, state of matter, ranking list of properties, discovery, classifications.
- Molar mass calculator: simple entry field for chemical formulas. Calculate molar mass simply and quickly.
- Offline use. No Internet needed. All contents in one app.
- Streamlined handling of access rights.
- Interactive operation: smart operating elements and numerous selection options.
- Variety of languages: German, English, French and Spanish.