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Physics Lesson 20.1.2 - Thompson's Atomic Model (in 1898)
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Welcome to our Physics lesson on Thompson's Atomic Model (in 1898), this is the second lesson of our suite of physics lessons covering the topic of Atomic Nucleus and Its Structural Properties, you can find links to the other lessons within this tutorial and access additional physics learning resources below this lesson.
Thompson's Atomic Model (in 1898)
According to the Thomson atomic model, often referred to as the "plum-pudding" model, the atom is a sphere of uniformly distributed positive charge about one angstrom in diameter (1 angstrom = 0.1 nm = 10-10 m). Electrons are embedded in a regular pattern, like raisins in a plum pudding or watermelon, to neutralize the positive charge.
However, now we know that this model is wrong, as the true atomic structure is completely different. The key discovery in this regard was made in 1911, with the experiment carried out by Rutherford, which we will explain in the next paragraph.
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