EVERYDAY SCIENCE

Detailed explanation-1: -The nucleus (or center) of an atom is made up of protons and neutrons.

Detailed explanation-2: -Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.

Detailed explanation-3: -Inside protons and neutrons are two more subatomic particles: quarks and gluons. Quarks are in the fermion category of fundamental particles, and there are three of them in each proton and neutron. They are bound together by gluons, which are categorized as bosons.

Detailed explanation-4: -Helium is the second element of the periodic table and thus is an atom with two protons in the nucleus. Most Helium atoms have two neutrons in addition to the protons. In its neutral state, Helium has two electrons in orbit about the nucleus.