4.3
11.1K reviews
500K+
Downloads
Content rating
Everyone
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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.
Updated on
May 7, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, App activity and 2 others
This app may collect these data types
Location, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.3
10.4K reviews
A Google user
December 20, 2019
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.
3 people found this review helpful
Dudley Filkins