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It is now believed that protons and neu...

It is now believed that protons and neutrons (which constitute nuclei of ordinary matter) are themselves built out of more elementary units called quarks. A proton and a neutron consist of three quarks each. Two types of quarks , the so called 'up' quark, (denoted by U) of charge `+ (2//3)` e and the 'down' quark (denoted by d) of charge `(-1//3)` e together with electrons build up ordinary matter. (Quarks of each other types have also been found which give rise to different unusual varieties of matter). Suggest a possible quark composition of a proton and neutron.

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It is now believed that protons and neutrons (which consitude nuclel of ordinary matter) are themselves built out of more elementary units called quarks. A proton and a neutron consits os three quarks each. Two types of quarks , the so called 'up' quark, (denoted by U) of charge + (2//3) e and the 'down' quark (denoted by d) of charge (-1//3) e together with electrons build up ordinary matter. (Quarks of each other types have also been found which give rise to different unsual varieties of matter). Suggest a possible quark composition of a proton and neutron.

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