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Lewis structures · resonance · ionic

Lewis Structure Drawer

Enter a formula — we'll place the atoms, distribute lone pairs, and show every resonance structure.

Subscripts as plain numbers (H2O). Ions: NH4+, SO4^2-. Hydrates: CuSO4·5H2O. Organics: alkanes, alcohols, polyols, aldehydes, carboxylic acids, open-chain sugars (C6H12O6), and benzene (C6H6).

Molecules
Diatomic
Resonance
Ions
Oxoacids
Ionic
Organics

H2O

1 structure
OHH
Dots around atoms are lone pairs. Lines are shared electron pairs (single, double, or triple bonds). Numbers like + or − next to an atom are formal charges.