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The 6 types of these include: up, down, bottom, top, charm, and strange.

Quarks, which make up the protons and neutrons inside atoms, come in six types: up, down, top, bottom, strange and charm
The 6 types of these include: up, down, bottom, top, charm, and strange.
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The 6 types of these include: up, down, bottom, top, charm, and strange.
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