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Secondary V • 1yr.

what did John Dalton add to the atomic model?


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Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

    Team Alloprof • 1yr.

    Hi RedFlamingo,

    Thanks for your question!

    Dalton's atomic model is the first model to be truly built upon scientific observations. His model is called the atomic theory and sets out four important points:

    1. Matter is made up of small, invisible and indivisible particles called atoms.
    2. Atoms of the same element are identical. They have the same properties and the same mass.
    3. Atoms of different elements have different properties and masses.
    4. Atoms can combine to form a new substance (a molecule). The produced molecule has different properties from the atoms that constitute it.

    I invite you to read these two pages for further explanations on the history of the atomic model and Dalton's atomic model:

    Don't hesitate to reach out again if needed:)


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