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Quatr.us Chemistry Atoms. Quarks and electrons are the tiniest particles. There are three quarks in every proton and three in every neutron, and protons and neutrons are the pieces of an atom.We can't see a quark, even with an electron microscope, but we know they must exist because that's the only way to explain what happens when scientists do certain experiments.The first quarks probably came into being just at the time of the Big Bang, right at the beginning of the universe.heir names don't really mean anything, just that they are different kinds of quarks. A proton is made of two up quarks and a down quark, and a neutron is made of two down quarks and an up quark.
Molecule. the smallest particle of a substance that can exhibit all the chemical properties of the substance. A molecule is composed of atoms (more precisely, of atomic nuclei, their surrounding inner electrons, and their outer valence electrons, which form a chemical bond). The inner electrons of atoms usually do not participate in the formation of such bonds. The molecular composition and structure of a given substance do not depend on the method of preparation used. In the case of monatomic molecules (for example, inert gases), the concepts of the molecule and the atom are congruent.