[1. what is composite partical
2. what is anti matter
3. what is quark
4. what is elementary particle
5. why is plasma neutral]?
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The strangeness of a particle is the sum of the strangeness of its component quarks. Of the six flavors of quarks, only the strange quark has a nonzero strangeness. Thestrangeness of nucleons is zero, because they only contain up and down quarks and no strange (also called sideways) quarks.
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