Exam (elaborations)
OCR 2023 GCSE CHEMISTRY B TWENTY FIRST CENTURY SCIENCE J258/04: DEPTH IN CHEMISTRY (HIGHER TIER) QUESTION PAPER & MARK SCHEME (MERGED
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2 © OCR 2023 Solid sphere Dalton’s model Modern model 1 Scientists use models to represent atoms. These models have changed over time. Dalton’s model and a modern model of an atom are shown in the diagrams. (a) Give two differences between the modern model and Dalton’s model. 1 .........
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