# How many states of matter exist?

Sep 11, 2016

At least $21$, possibly as many as $26$ or more

#### Explanation:

Rather than enumerate them all, note that there are $4$ classical states:

• Solid
• Liquid
• Gas
• Plasma

• $6$ known non-classical states (e.g. liquid crystal)

• $8$ known low temperature states (e.g. Bose-Einstein condensate a.k.a. BEC)
• $3$ known high energy states (e.g. Degenerate matter (white dwarf and neutron star material))

Then there are $5$ proposed states:

• Supersolid
• String-net liquid
• Superglass
• Dark matter
• Equilibrium gel

See https://en.wikipedia.org/wiki/State_of_matter for more details.