oxygen
h2o
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Hydrogen gas is an element because it is made up of only one type of atom, which is hydrogen.
No, kerosene is not an element. It is a flammable hydrocarbon liquid mixture commonly used as a fuel. It is composed of carbon and hydrogen atoms bonded together.
Liquid halides are compounds that contain a halogen element, such as chlorine or bromine, combined with another element or group and exist in a liquid state at room temperature. These substances are often used in industrial processes, particularly as solvents or catalysts. Examples include liquid hydrogen chloride or liquid bromine.
Liquid hydrogen is the coldest substance known to man, minus 400 degrees
Hydrogen is a liquid btween -252,879 oC and 259,16 oC.