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Excel A level chemistry paper 1 topics Questions and Answers
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A LEVEL CHEMISTRYT
A LEVEL CHEMISTRYT
Excel A level chemistry paper 1 topics Questions and Answers Atoms Made up of 3 subatomic particles - electrons, neutrons and protons Electrons - Subatomic particle - Charge of -1 - Arranged in orbitals - Relative mass of 0.0005 - negligible Nucleus - Where most of the mass of the atom is contained - Made up of protons and neutrons - Diameter is much smaller than that of whole atom Neutrons - Subatomic particle - No charge - Relative mass of 1 - Contained in nuc...
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