Structure Of The Atom
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Key Concepts
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Subatomic Particles: Atoms are composed of electrons, protons, and neutrons.
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Atomic Model Evolution: From Thomson's 'plum pudding' model to Rutherford's nucleus and Bohr's energy levels.
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Atomic and Mass Numbers: Atomic number indicates an element's identity, while mass number gives the total count of nucleons.
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Isotopes and Isobars: Isotopes have the same atomic number but different mass numbers, while isobars have the same mass number but different atomic numbers.
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Valency: The combining capacity of an atom is determined by the number of electrons in its outermost shell.
Memory Aids
Interactive tools to help you remember key concepts
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Rhymes
Protons positive, neutrons neutral,
Electrons negative, that’s their crucial recital.