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Toolbox
Every tool on this site
Calculators, charts, labs and quizzes — every tool works in both languages and on any phone: the molar mass calculator, printable tables, virtual lab and orbital viewer.
Molar mass calculatorType any formula — brackets and hydrates included — and get the mass, the breakdown and a mole↔gram converter.Printable periodic tablesSix free A4 PDFs — English and Bangla, colour and black-white, plus blank practice sheets.Virtual labThree animated experiments: alkali metals in water, flame tests and the iron-in-copper-sulfate displacement.3D orbital viewerThe real hydrogen wavefunctions as rotatable point clouds — see s, p and d shapes in the round.Trends explorerRadius, electronegativity and ionisation energy charted across all 118 elements.Compare toolAny two or three elements side by side — plus 40 ready-made X vs Y pages.QuizTen questions a round, drawn partly from the element notes themselves.60-second challengeName as many elements as you can in one minute — English, Bangla or symbol.MnemonicsBilingual memory hooks for the families and series.Random elementOne tap, one surprise element to explore.