Why electron have one up quarks and 2 down quarks ?

1.	Why electron have one up quarks and 2 down quarks ?
Answer» Neutron contain one up quarks & two down quarks. The nucleus is held together by the "strong nucleus force" which is one of four fundamental forces (gravity & electrmagnetism are two others). The strong force counteracts the tendency of the positively-charged protons to repel each other.

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