Question

1.31 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.​

Answer 1

Answer:

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