Neither. Air is a mixture.
Also, whether something is a compound or an element does not depend on temperature.
K2CrO4
Neon is a chemical element not a property.
Helium is gaseous but it is not a mixture - it is a chemical element.
Promethium is a chemical element with the symbol Pm and an atomic number of 61. It is solid at room temperature.
mercury is a liquid at room temperatute At room temperature, mercury is a LIQUID.
Iodine is a chemical element; naphtalene is an organic compound. They can sublimes at room temperature.
Mercury is an element. It has chemical symbol Hg. It is the only metal that is liquid at room temperature, and very toxic.
NaHCO3 , sodium bicarbonate, is a compound. It is a solid at Room temperature, since it is ionic. The elements in sodium bicarbonate are: Sodium(Na), Hydrogen(H), Carbon (C) and Oxygen (O).
Hydrogen is a chemical element, gas at room temperature, having a diatomic molecule.
metallic element liquid at room temperature
K2CrO4
Mercury (Mg) is an element. It is a liquid metal at room temperature.
Neon is a chemical element not a property.
Helium is gaseous but it is not a mixture - it is a chemical element.
Promethium is a chemical element with the symbol Pm and an atomic number of 61. It is solid at room temperature.
At room temperature uranium is a solid metal.
This chemical element is bromine (Br).