OCR GCSE Chemistry B · J258
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Diagrammatic and numerical translationBond lines must not be counted as atoms. They provide different numerical information: one line represents one covalent bond, while two parallel lines represent a double bond. Likewise, dots and crosses in an electron diagram represent electrons rather than extra atoms.