Partial charge on selected atoms
Resonance on selected bonds
Guided lesson
5 guided steps · Draw directly on the molecular canvas
Answer:
Start a saved six-question session or choose exactly what you want to practice.
Search by common or chemical name, such as aspirin or caffeine. Sends the name to PubChem, then OPSIN if no match is found. Requires internet. A successful lookup replaces the drawing.
All 118 elements are available for drawing and importing. Naming support varies.
Uses assigned formal charges and includes implicit hydrogens. Lone pairs update as you edit.
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