'The proton consists of 2 types of this elementary particle: 2 up & 1 down'
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GENERAL SCIENCE: The proton consists of 2 types of this elementary particle: 2 up & 1 down
The proton consists of 2 types of this elementary particle: 2 up & 1 down
The proton consists of 2 types of this elementary particle: 2 up & 1 down
GENERAL SCIENCE
quarks
GENERAL SCIENCE