They form coloured compounds and act as catalysts. Sample exam questions - atomic structure and the periodic table - AQA Understanding how to approach exam questions helps to boost exam performance.

In this series, podcast presenters Dr Sunayana Bhargava and Tulela Pea guide you through everything you need to know about atomic structure and the periodic table to ace your GCSE science exam.

N. Bohr on the development of the theory of atomic structure, and in particular of the latest form and tendencies of the quantum theory in their relation to mechanics. New points are raised which ...