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Protons, Neutrons & Electrons — Unveiling Atomic Mass ⚛️ #gcsechemistry
In the 1930s, James Chadwick discovered the neutron — a particle in the nucleus with no charge but similar mass to a proton. Because their masses are almost identical, both are given a relative mass of 1. An electron, however, is about 1/1840 the mass of a proton, meaning its contribution to atomic mass is negligible. 🎥 Watch the full ...
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