How the periodic table is organised
How the periodic table is organised
The periodic table arranges elements in order of increasing atomic number. The atomic number is the number of protons in an atom.
Step-by-step lessons on AQA GCSE Chemistry 1.2.1 The periodic table. 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.