Instrument online · 118 elements indexed
Everything matter
is made of,
in one instrument.
A periodic table you can actually interrogate. Recolour all 118 elements by any property, scrub the temperature and watch them melt, open a real quantum orbital in 3D, and run the calculations chemistry homework actually needs.
- Elements
- 0
- Properties
- 0
- Languages
- 0
- Price
- Free
The main instrument
Recolour the table by whatever you are studying
The grid below is live. Switch the colour channel to see a periodic trend appear across the whole table at once — then drag the temperature to watch the elements melt and boil in order.
Why the table has a shape
The periodic law, plotted
Mendeleev arranged the elements by weight and noticed the properties repeated. Plot any property against atomic number and you can see it: the same pattern, once per row, forever.
The bench
Six instruments, no sign-up
Everything runs in your browser. Nothing is uploaded anywhere.
3D Atom Lab
Add protons, neutrons and electrons one at a time and watch an element assemble itself. The nucleus reacts, the shells fill in order, and a stability read-out tells you whether what you built would actually survive.
Enter the labMolar mass calculator
Type any formula — Ca(OH)2, CuSO4·5H2O — and get the molar mass with a per-element breakdown.
Equation balancer
Enter an unbalanced reaction and get the smallest whole-number coefficients, solved by linear algebra rather than trial and error.
OpenElectron configuration
Build any element's configuration by hand and get instant feedback, with the Aufbau diagonal drawn out step by step.
OpenSide-by-side compare
Put up to four elements next to each other and see every measured property lined up, with percentile bars against all 118.
OpenElement decoder
One element is hidden. Two clues are free, the rest cost points, and every wrong guess tells you which way to move. Deduction, not multiple choice.
PlayTen families
Elements that behave alike, sit together
Chemical family is the single best predictor of how an element behaves. Each one has its own guide.
From the archive
Every gram of your body contains roughly 6×10²² hydrogen atoms, most of them older than the Sun.
Start with the one you are stuck on.
Hit CtrlK anywhere on the site and type a name, a symbol, an atomic number, or something vague like “radioactive”.