Chemistry · IGCSE · Edexcel · Pearson Edexcel International GCSE (9–1) Chemistry (Modular) — 4XCH1 · Specification point · 1.18 · Principles of chemistry: Part 1 · The Periodic Table
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| Learners should: |
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1.18 understand how elements are arranged in the Periodic Table: • in order of atomic number • in groups and periods. |