What a covalent bond is
What a covalent bond is
Atoms are most stable when their outer shell is full. When two non-metals react, neither atom can easily give electrons away, so they share electrons instead.
Step-by-step lessons covering Edexcel GCSE Chemistry Covalent bonding for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.