Question

List the reason for nucleus to exhibit positive charge.

Answer 1

A proton is a subatomic particle with the symbol p or p+ and a mass slightly less than that of a neutron. It has a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron. Protons and neutrons, each with a mass of around one atomic mass unit, are referred to as "nucleons" collectively (particles present in atomic nuclei).

Complete step-by-step solution:
The nucleus is made up of protons (which are positively charged) and neutrons (which are electrically neutral) particles. Quarks are the particles that make up protons and neutrons. Up quarks and Down quarks are the two forms of quark particles.
The charge of each up quark is $+\dfrac{2}{3}$, while the charge of each down quark is $-\dfrac{1}{3}$.
Protons are positively charged because they are made up of two up quarks ($+\dfrac{4}{3}$) and one down quark ($-\dfrac{1}{3}$). As a result, their net charge is +1. Neutrons have a net charge of 0(zero) since they are made up of one up quark ($+\dfrac{2}{3}$) and two down quarks ($-\dfrac{2}{3}$). Neutrons are electrically neutral as a result of this.
The number of protons in the nucleus, or the atomic number, Z, determines the chemical element of an atom.
A positively charged particle can be formed by combining positively charged and neutral particles. As a result, the nucleus has a net positive charge. The number of protons in a nucleus determines the magnitude of its charge.

Note: Isotopes are chemical element variants that differ in neutron number and, as a result, in nucleon number. Each atom in an isotope of a given element has the same number of protons but differs in the number of neutrons. Protium has no neutrons in its nucleus. It is considered as the most stable isotope of hydrogen.