Merck PTE

Merck KGaA, Darmstadt, Germany

About this app

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.

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.

Ratings and reviews

The atomic radius chart is not correct. Helium is the smallest element with an atomic radius of 31pm, but in the atomic radius chart its given as 128pm. And thats not all, there are other more faults in the table. Please look into this matter and correct the required stats.

Easy and fun to use. Lots of helpful and interesting information about each element. One puzzling thing I found while researching Polonium: atomic weight given as 208.982 but isotopic composition only includes isotopes of 210 and heavier (even though the isotope with the longest Half-Life is Po-209). Just curious how thus adds up?

Great app ! Just need to be aware not to use in full extended screen with S8+ : you won't hit the right element. Works perfectly though in normal display, many infos, really good.

What's new

New features:
- Additional translations: Chinese (simplified), Portuguese, Russian
- 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
- 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