It depends on the pressure and temperature.
it is more than one substance that takes the shape of its object
It is a gas.
It is a gas.
Gas.
Solid
I believe that at room temperature, Carbon resides in the state of Minnesota.
gas
can be a solid liquid or gas
All allotropes of carbon (graphite, diamond, buckyballs, nanotubes, ect.) are commonly solid
Both are in gaseous state at 25Celsius
Yes. Everything that exists is matter in a various state.
Carbon is a chemical element. It has the symbol C.
Gas can sometimes be visible with the example of smoke from a cigarette but it is also invisible as in the case of carbon monoxide which could not be seen or smelled.
Matter can change from physical state to physical state while retaining its identity. Different types of matter will react with other matter and reorganize. Matter can even change from one element to the next if it undergoes the process of nuclear decay.