Subatomic Particles

When were subatomic particles discovered?
Answered by Science Channel
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  1. The first subatomic particle was discovered in 1897, when British physicist J.J. Thomson discovered the electron. By the 1950s, physicists had isolated numerous other subatomic particles. In 1964, Murray Gell-Mann and George Zweig independently theorized that the subatomic particles known to exist at that time could be broken down into even smaller components; Gell-Mann referred to these tiny particles as quarks. By the 1980s, strong evidence existed that Gell-Mann and Zweig's theory was correct, and the theory of quantum chromodynamics explained the behavior of quarks.

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