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Tap any element to see its atom and everything you can read from its square. Drag the atom to turn it, scroll to zoom.
Find it and Name it drill the table. Math is protons, neutrons, electrons and weighted averages. Electrons fills subshells in order. Lewis has you place the dots. Trends compares size and electronegativity. Exam is a mock test that ticks off the study guide as you go.
Cloud shows where electrons are likely to be, from real orbital math. Tap a subshell like 2p to see its orbitals one at a time. Each orbital holds 2 electrons, so p, with 3, holds 6. Distances are compressed so you can read them, and the shells view is a simple model, also not to scale.
Element data from mendeleev and PubChem. Drawing: three.js (MIT). Your scores stay in this browser.