Question

Quarks have a fractional charge. Explain why, if a neutron is made up of three quarks, it is uncharged.




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Answer 1

Answer:

A neutron, like the name implies, is neutral with no net charge.

Explanation:

      The charge is believed to be from the charge of the quarks that make up the nucleons (protons and neutrons). A proton is made of two Up quarks, with 2/3 positive charge each and one Down Quark with a negative 1/3 charge (2/3 + 2/3 + -1/3 = 1).

      A neutron is made up of two Down quarks with a negative 1/3 charge each and one Up quark with a positive 2/3 charge (-1/3 + -1/3 + 2/3 = 0).

      Quarks were thought to be the only particles with fractional charge – and today they only exist in particles that have a integer charge. But last month, two groups of physicists revealed the first direct evidence that an electric current can be carried by quasiparticles with fractional charge

      Each proton and each neutron contains three quarks. A quark is a fast-moving point of energy. There are several varieties of quarks. Protons and neutrons are composed of two types: up quarks and down quarks.

      These particles are only its decay products. A neutron is made of 3 quarks, one up quark, and 2 down quarks and many many "intermediate particles" called gluons which carry the interaction between the quarks.

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