AQA GCSE CHEMISTRY - Discovery of the atom

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10 Terms

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Dalton's Atomic Theory

Proposed that matter is made up of small indivisible particles called atoms.

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Thomson's Plum Pudding Model

Suggested that atoms are a uniform sphere of positive charge with embedded electrons.

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Rutherford's Nuclear Model

Discovered that atoms have a dense nucleus positively charged, surrounded by electrons.

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Bohr Model

Proposed that electrons orbit the nucleus in specific energy levels or shells.

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Wave-Particle Duality

Concept that particles such as electrons exhibit both wave-like and particle-like properties.

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Quantum Mechanical Model

Describes electrons in terms of probabilities rather than fixed orbits.

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Electron Cloud Model

Visualizes the regions around the nucleus where electrons are likely to be found.

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Heisenberg Uncertainty Principle

States that it is impossible to simultaneously know both the position and momentum of an electron.

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Periodic Table Development

Organizes elements based on atomic number and properties, reflecting atomic structure.

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Modern Atomic Theory

Incorporates principles of quantum mechanics into the understanding of atomic structure.