Practise your skills with these exam-style combined science questions based on GCSE past papers. Or take our combined science topics exam practice quiz which lets you choose the topic you want to ...

Welcome to our online chemistry lab where you can learn more about changes of state. Interact with the activity to see what happens at the particle level when different substances are heated. Back to ...

Halogen bonding, hyperconjugation, electroactive polymers -- such subjects are typical fare in graduate-level chemistry courses. But how many classes challenge students to explain the concepts to the ...