Usually solid, but using a vacuum chamber (to prevent oxidation) and intense light or electron beams it can become vapor. This is how vapor deposition of diamond, graphine, buckyballs or nanotubes can be done.
Carbon typically has an oxidation state of 4 in compounds such as carbon dioxide (CO2) and methane (CH4).
Carbon-12
The state of carbon at standard room temperature and pressure is solid.
Compounds do not get a new name when they change physical state. Carbon dioxide's name in the liquid state in just "liquid carbon dioxide"
The oxidation state of carbon in carbon monoxide (CO) is +2. In CO, carbon is more electronegative than oxygen and pulls the shared electrons towards itself, giving it a formal oxidation state of +2.
In its most reduced state, carbon is typically found as elemental carbon, which can exist in forms such as graphite or diamond. In these forms, carbon has the lowest oxidation state, with a formal oxidation state of 0. This means that it is not bonded to more electronegative elements, allowing it to maintain its reduced state.
Carbon dioxide is not a state symbol. It is a chemical compound composed of one carbon atom and two oxygen atoms.
The hybridization state of each carbon atom in nemotin is sp3.
I believe that at room temperature, Carbon resides in the state of Minnesota.
The standard state of carbon is a solid structure. Carbon reached their full solid structure when the state hits 298 K. Carbon is found three different but common forms such as diamond, graphite and amorphous.
The oxidation state of carbon in CaCO3 is +4. This is because the oxidation state of calcium (Ca) is +2 and the oxidation states of oxygen (O) are -2. Therefore, to balance the charges in the compound, the oxidation state of carbon must be +4.
The oxidation state of carbon in graphite is 0, as each carbon atom is bonded to three other carbon atoms in a flat, hexagonal lattice structure. This results in a fully covalent bonding arrangement where carbon shares its valence electrons, meaning there is no formal transfer of electrons and therefore no oxidation state.