140. It is now known that protons and neutrons are themselves build out of elementary unit called quark . the up quark (u) has a charge +2e/3 and down quark (d) has charge -e/3. the composition of proton and neutron can be. (1) uud,udd (2) udd,uud (3) ddd,uuu (4) uuu,ddd

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Q. 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 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.

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 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.

Q. It is now known that a proton and a neutron consist of three elementary units called 'quarks'. Two types of quarks are involved the 'up' quark (u) of charge