AQA GCSE CHEMISTRY - Discovery of the atom

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10 Terms

1

Dalton's Atomic Theory

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

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2

Thomson's Plum Pudding Model

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

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3

Rutherford's Nuclear Model

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

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4

Bohr Model

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

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5

Wave-Particle Duality

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

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6

Quantum Mechanical Model

Describes electrons in terms of probabilities rather than fixed orbits.

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7

Electron Cloud Model

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

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8

Heisenberg Uncertainty Principle

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

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9

Periodic Table Development

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

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10

Modern Atomic Theory

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

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