KS3 Chemistry: Elements & Compounds — Challenge

KS3 Chemistry: Elements & Compounds — Challenge is a greater-depth stretch activity book for Key Stage 3 chemistry, mapped to the DfE National Curriculum. Five demanding challenges push confident learners through careful classification of alloys, gases and compounds, counting elements and atoms in a formula, harder chemical symbols and formulae, the periodic table (named groups, reactivity and the metal/non-metal balance), harder separation methods (distillation and chromatography) and using properties to identify metals. Challenges 1–4 hold twenty-four auto-marked questions; Challenge 5 is an open reasoning task — explaining compound versus mixture, designing a separation of rock salt, and predicting the properties of a Group 7 element — with a full worked answer key. Includes teacher, parent and pupil notes and is fully SEND-friendly with high-contrast and large-text modes.