First Generation Matter

First Generation Matter, sometimes referred to as 1GM or n-n-matter, is by far the most common type of matter and the only type of matter that is stable for macroscopic time frames. It is composed of the first generation matter particles; the up-quarks, the down-quarks and the electrons.

Averaging all of their constituents, atoms made of First Generation Matter are over six times heavier than those made of single prime matter and 227 times lighter than Second Generation Matter, i.e. atoms made of strange quarks, charm quarks and muons.

Properties
Almost all of the matter naturally occurring in the universe is First Generation Matter. The only natural exceptions are small amounts of Second Generation Matter existing inside neutron stars.

Natural 1GM consists of up-quarks and down-quarks (which joined together form the only two naturally stable hadrons, the protons and neutrons) and the electrons. Protons and neutrons exchange the Strong Force via the action of a third type of hadron, the pion. In this way, the range of the Strong Force can be extended, allowing the protons and neutrons to form atomic nuclei. The electrons surround the atomic nuclei, forming atoms.

First Generation Matter is sometimes known as 1GM (rarely FGM, to avoid confusion with fourth and fifth generation matter and female genital mutilation). It is also known as n-n-matter, the first n referring to the fact it is n-matter not antimatter, the second n denoting normal, First Generation Matter as opposed to higher or prime generation matter.