Helium is a colorless, odorless, tasteless gas. It has a number of unusual properties. For example, it has the lowest boiling point of any element, -268.9 ° C (-452.0 ° F). The boiling point for a gas is the temperature at which the gas changes to a liquid. The freezing point of helium is -272.2 ° C (-458.0 ° F).Web