Shared electron pairs
Shared electron pairs
A covalent bond forms when two atoms share a pair of electrons. It is the strong electrostatic attraction between the shared pair of negatively charged electrons and the positively charged nuclei of both bonded atoms.
Step-by-step lessons on AQA GCSE Chemistry 2.1.4 Covalent bonding. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.