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Covalent Bonding Mechanism

AQA GCSE Chemistry (8462) — Bonding, structure, and the properties of matter

What You Need to Know

Draw dot and cross diagrams for small molecules (e.g., H2, Cl2, O2, N2, HCl, H2O, NH3, CH4).
Recognize substances containing small molecules, polymers, and giant covalent structures.
Represent covalent bonds using lines in structural formulas.
Deduce molecular formulas from models.
Evaluate limitations of different models for representing covalent structures.