New · Chemistry & Materials

Chemistry & Materials Playground

Build compositions and crystal models, then see what the rules say about them. Everything you build is a candidate — the playground never claims a compound exists just because you can assemble its formula.

Looking for physics? Physics simulations →

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🧪Foundations

Periodic table

All 118 elements: electron configuration, oxidation states, electronegativity and mass. Click to explore, then send an element to the compound builder.

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⚗️Foundations

Compound builder

Click elements to add them, set atom counts, and read off the formula, molar mass, mass percentages and a rule-based charge-balance check.

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💎Materials

Perovskite lab

Assign A, B and X sites (ABX₃ or double A₂BB′X₆), get the Goldschmidt tolerance and octahedral factors, rotate the model, and export a CIF.

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🔩Materials

Heusler alloys

Half-Heusler XYZ and full-Heusler X₂YZ (regular and inverse) with alternative site arrangements, valence-electron rules and a Slater–Pauling estimate.

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🔷Materials

Crystal builder

Pick a cubic prototype (rocksalt, CsCl, zincblende, fluorite, fcc, bcc, diamond…), assign elements and read computed coordination, density and packing.

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🧬Organic

Organic molecules

Draw atoms and bonds or type a SMILES string; get the formula, functional groups and library isomers with the same formula.

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☢️Nuclear

Nuclear playground

Choose a nuclide, test decay modes against conservation laws, follow decay chains, run the half-life law and check nuclear equations.

Four levels of evidence

User-built candidate: A composition or structure you proposed.
Rule-based assessment: Checks such as charge balance or geometric factors.
Database-supported material: A reported compound or structure, with its source.
Calculated result: A property from a stated computational method.

This first release produces the first two. Database look-ups and calculations are not built in yet, and results are labelled accordingly.