Atomic Structure

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A series of free GCSE/IGCSE Physics Notes and Lessons.

Atomic Structure
Radius of atoms and the nucleus
Electrons and energy levels
How electrons can move energy levels when an atom absorbs electromagnetic radiation?

Atomic and Mass numbers
How to use the atomic and mass numbers for an element to work out the numbers of protons, neutrons and electrons?
What is meant by isotopes and ions?

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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