Purely imaginary. There is no such location; it cannot have a name.
most matter that exists in the universe is in the plasma state
Oh, well this is an interesting question, and a fun one to answer!Basically, dark matter is proposed to exist because of the observations of interacting masses both within and between galaxies. (Note that it is not just the Milky Way that is proposed to contain dark matter; rather, 84% of the universe is hypothesized to be made of dark matter.) Basically, the total mass of all the stars and planets and other celestial objects should not be enough to cause the effects of gravitational lensing, solar revolution, etc. that are observed. Therefore, dark matter is proposed to exist; a type of matter that only interacts with gravitons and W bosons (only interacts with gravity and the weak force) and that is entirely undetectable.
This is not currently known. There does exist some asymmetry between matter and antimatter - meaning that they are not exact opposites in all aspects - but this asymmetry is not enough to explain why matter exists.
'Dark matter' and 'dark energy' have not been observed or proven yet.
It is not believed that any black dwarfs exist yet, as the universe is not old enough for a white dwarf to cool.
state or phase
The universe contains space and time. "Outside" the universe, there would be no space or time, and without these, nothing can exist.
No, a black hole contains a lot of matter and thus has a huge gravitational pull. Absolute vacuum doesn't exist anywhere we know of.
Bose-Einstein condensate
A thin layer of gray matter called the cerebral cortex comprises the outer portion of the cerebrum.
The states matter can exist in are solids,liquids,and gases.
The wave is a disturbance in the electric and magnetic field in space. These fields exist even in empty space.
Matter can exist in a solid, liquid, or gas as well as plasma.
Eris is a dwarf planet that exists beyond Pluto
Matter can exist in four forms: plasma, gas, liquid, solid.
Space is a vacuum, there is no real air like the air comprised of Oxygen and Nitrogen, etc. that we have in Earth's atmosphere. The vast distances between the objects of the universe are actually comprised of no 'matter' though (and this goes way beyond my head) there may/does exist dark matter which accounts for much of the universes mass, but we still don't have a solid grasp on what it is. There's also a some dust particles floating around in space, but for the most part, space is empty and doesn't contain any 'air' that could be given a name. So my answers are: Space contains a vacuum, in which very minimal matter exists including 'air'. This could be called a vacuum. Seems like you are asking for a name for the air, which doesn't actually exist, but that space could be called a vacuum. Possibly dark matter but I don't eve want to go there with my limited knowledge.
There is no space where there is no matter. Even in a vacuum, matter, no matter how miniscule does exist.