Chemistry tools

Everything runs on one rigorously-validated chemistry engine. Pick a tool to get started, no account needed.

Lewis Structure Generator

Formula in, structure, formal charges, and a full explanation out.

Electron and molecular geometry, AXE notation, and bond angles.

Every valid resonance form, with delocalization explained.

Two structures side-by-side: bonding, charges, molecular geometry.

Draw structures yourself on a live canvas: pick a difficulty and keep going.

Solve the whole structure step by step: budget, bonds, charges, shape.

Random compounds by difficulty, each solved end to end in Solve Mode.

Infinite shape drilling: steric number, AXE notation, both geometries and bond angles.

Charges, cations and anions, electron counts, and the ions a salt is built from.