Second Generation Matter

"Not to be confused with Strange Matter, a form of largely First Generation Matter containing strange quarks."Second Generation Matter, sometimes known as 2GM or n-2-matter, is a type of matter composed of second generation matter particles, i.e. charm quarks, strange quarks and muons instead of up quarks, down quarks and electrons.

Averaging all of their constituents, atoms made of Second Generation Matter were 227 times heavier than First Generation Matter. Thus, any object made of Second Generation Matter would be chemically almost identical to it's equivalent in First Generation Matter, but 227 times more massive. It is 156 times less massive than Third Generation Matter.

Properties
Second Generation Matter is unstable, with all of its components decaying in a fraction of a second. The longest lived components are the muons, which can survive for up to 1/500,000th of a second.

Using Equilism or time dilation, however, the lifespan of Second Generation Matter particles could be greatly increased.