Lewis Structure Builder
Enter a molecular formula to generate its Lewis dot structure with bonding pairs, lone pairs, and formal charges.
Examples:
H₂O
BondLone pairPositive chargeNegative charge
Structure Summary
Total valence electrons8
BondsO–H (single), O–H (single)
Formal charges
O: 0H₁: 0H₂: 0
Octet rule
✓O (central): 8e\u207B / 8e\u207B target
✓H (#2): 2e\u207B / 2e\u207B target
✓H (#3): 2e\u207B / 2e\u207B target
All atoms satisfy the octet rule.
Supports simple molecular formulas with charges (use ^ for charge, e.g. SO4^2-). Expanded octets for period 3+ elements.