Talk:Matter/@comment-34446855-20160125210044

No but basically, almost everything is made of atoms, which are made up of electrons and up and down quarks (forming neutrons and protons).

These three are all in one weight class of particles, and there are lighter and heavier ones, but these are unstable unless you use artificial forces to stabilize them. If you can do this, you can make atoms that are lighter or heavier.