Build molecules with a clear, physics-aware canvas
Valence-safe interactions, instant stability feedback, and a teaching-friendly HUD for fast reviews.
Stability
Ready
Formula
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Atoms
0
Bonds
0
Quick picks (no scrolling)
Tap an element or bond type; invalid options are auto-blocked.
Checking valence rules
Recognition will appear here
Electrons needed: 0 e-
Unstable atoms: 0
Hold + drag to place or upgrade a bondShift+Click to select multiple atoms
Click empty space to drop an atom
Drag from one atom to another to create or upgrade a bond
Shift+Click for multi-select; Delete to clear selection
Ctrl/Cmd+Z undo; Ctrl/Cmd+Y redo
Molecule Presets
Type to filter molecules. Use categories below to narrow results.
31 molecules found
💡 Tip:
Click any molecule to load it instantly. All coordinates are pre-calculated for perfect 3D visualization. Try searching by name, formula, or use (e.g., “fuel”, “medicine”, “solvent”).
Stability & Charge Map
Inspect formula, bonds, charge balance, and per-atom stability without leaving the canvas.
Stability Monitor
Start building or load a preset to see per-atom checks.
Scenarios to explore
- Compare linear CO2 against bent H2O to see angle and charge differences
- Add halogens and attempt bond upgrades to feel valence ceilings
- Intentionally overbond to observe how formal charge warnings react