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Atomic structure, elements, Mass spectrometry, Gold foil experiement,…
Atomic structure
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Planck, Schrödinger, de Broglie et al
1930's
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elements
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Isotopes
atoms that have the same atomic number but different mass numbers due to a different number of neutrons in the nucleus
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Mass number - top (Whole number)
(How many protons and neutrons)
Atomic number - bottom (how many protons)
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Gold foil experiement
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Most particles went straight through, some bounced off at angles
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