Molveth: Periodic Table Quiz

Molveth is a periodic table quiz, a chemical equation balancer and a set of chemistry calculations in one offline app. Look up an element, practice it, balance an equation or check a molar mass without leaving the table.

PERIODIC TABLE OF ELEMENTS

Pan and zoom a full 18-group table. Color it by category, by a property, or by phase at a temperature you choose. Search by name, symbol or atomic number, pin up to three elements to compare them side by side, and read every value with its unit, precision and source. Open an element for its electron configuration, common oxidation states, isotopes with abundances and half-lives, and a rotatable orbital model. A trend plot shows ionization energy and other properties against atomic number, with the well-known exceptions marked. Missing or estimated values are labeled as such, never shown as zero.

PERIODIC TABLE QUIZ

Practice with spaced repetition: questions return when you are about to forget them. Pick exactly which groups, periods or elements to study, then answer where an element sits, what its symbol is, which charge an ion carries, how an electron configuration is written or which oxidation state is common. Every answer comes with an explanation and takes you back to the same place in the table. There are no lives and no streak pressure, sessions start untimed, and you can see your next review dates. If you only want a chemistry quiz for one block of the table, set it up in a few taps.

CHEMICAL EQUATION BALANCER

Type a formula or an equation with brackets, hydrates and charges, check how Molveth reads each species, then balance it. The solution comes with an atom and charge ledger, plus oxidation numbers for redox equations, so you can see why the coefficients are right. For acidic or basic solutions you add the H+ and H2O or OH- and H2O yourself, step by step. Invalid input is explained and never erased. A balanced equation shows that atoms and charge are conserved; it does not tell you whether a reaction really happens. Use it to balance chemical equations for homework, then carry the result straight into stoichiometry.

CHEMISTRY LAB TOOLS

Molar mass from a formula, with hydrates, per-element contributions and mass percent. Stoichiometry with a limiting reagent and titration amounts. Solution preparation, dilution (C1V1 = C2V2), the ideal gas law with a two-state mode and molar volume, particles and moles, pH, and empirical and molecular formulas. Every result shows its working and units, and significant figures follow your inputs. These are educational calculations: follow your instructor's protocol in the real lab.

FOR CLASS AND REVISION

Teachers can project a large, labeled table and blank chosen cells for a class exercise. Save calculations to a notebook, rename or delete them, and export a reference sheet to print or share. A short glossary explains terms such as limiting reagent or significant figures, with worked examples.

MADE FOR YOUR REGION

16 languages with automatic detection. Units follow your device region and each one can be changed separately: temperature, pressure, mass, volume, concentration and paper size. Light and dark themes, large text and screen reader support.

OFFLINE AND PRIVATE

Molveth has no internet permission, no account and no analytics. Your notebook and practice history stay on this phone, and you can export or erase them whenever you like. Current version: free, no ads.