SSC MTS EXAM

Detailed explanation-1: -An electron has a negative charge, a proton has a positive charge while neutrons are uncharged species. Protons and neutrons are present inside the nucleus of an atom while electrons revolve around circular orbits.

Detailed explanation-2: -Quarks make up protons and neutrons, which, in turn, make up an atom’s nucleus. Each proton and each neutron contains three quarks. A quark is a fast-moving point of energy. There are several varieties of quarks.

Detailed explanation-3: -Alpha particles (a) are composite particles consisting of two protons and two neutrons tightly bound together (Figure 1). They are emitted from the nucleus of some radionuclides during a form of radioactive decay, called alpha-decay.