Please explain

Asked by  | 21st Mar, 2009, 11:19: AM

Expert Answer:

The electric charge of quarks is important in the construction of nuclei. The hadron constituents of the atom, the neutron and proton, have charges of 0 and +1 respectively; the neutron is composed of two down quarks and one up quark, and the proton of two up quarks and one down quark. The total electric charge of a nucleus, that is, the number of protons in it, is known as the atomic number, and it is the defining difference between atoms of different chemical elements.

Answered by  | 28th Mar, 2009, 05:29: PM

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