chemistry maths

Gcse

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Atoms
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May 2025

2024/2025
An atom is the smallest unit of an element that still retains the properties of that element, and it is made up of three subatomic particles: protons, neutrons, and electrons. Protons, which carry a positive charge, and neutrons, which have no charge, are located in the atom’s nucleus, while electrons, which are negatively charged, move in energy levels or shells around the nucleus. The atomic number of an atom tells us the number of protons (and also electrons in a neutral atom), while the ma...
timothyanderson2009
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