- PF₅: Phosphorus is central, bonded to five fluorine atoms with single bonds. Each F has three lone pairs. P has no lone pairs.
- NO: Nitrogen and oxygen are connected by a double bond. N has one lone pair, O has two lone pairs. Add one unpaired electron on N to account for the odd-electron nature.
- I₃⁻: Central I bonded to two terminal I atoms with single bonds. Central I has three lone pairs; each terminal I has three lone pairs. Add one extra electron (negative charge) to central I.
- HCN: H–C≡N. C and N triple-bonded. N has one lone pair. H has no lone pairs.
- BrF₅: Bromine central, bonded to five F atoms with single bonds. Br has one lone pair. Each F has three lone pairs.
- CO: Carbon and oxygen connected by a triple bond. C has one lone pair, O has one lone pair.
- BrF₃: Bromine central, bonded to three F atoms with single bonds. Br has two lone pairs. Each F has three lone pairs.
- CO₂⁻: [O=C=O]⁻. Two double bonds. One O has three lone pairs and negative charge; other O has two lone pairs. Carbon has no lone pairs.
- SCl₄: Sulfur central, bonded to four Cl atoms with single bonds. S has one lone pair. Each Cl has three lone pairs.
- AlH₃: Aluminum central, bonded to three H atoms with single bonds. No lone pairs on Al or H.
- BF₃: Boron central, bonded to three F atoms with single bonds. B has no lone pairs. Each F has three lone pairs.
- C₂H₄: Two C atoms double-bonded. Each C bonded to two H atoms. No lone pairs.
- PH₃: Phosphorus central, bonded to three H atoms with single bonds. P has one lone pair. H atoms have no lone pairs.
- C₂H₆: Two C atoms single-bonded. Each C bonded to three H atoms. No lone pairs.
- NH₄⁺: Nitrogen central, bonded to four H atoms with single bonds. No lone pairs on N. Positive charge on N.
Parent Tip: Review the logic above to help your child master the concept of lewis structures practice worksheet.
