Helium gas is used to obtain a very low temperature.
Helium is a chemical element with He symbol and Helium is a colourless, tasteless, and odourless gas with atomic number. Helium is the Universe’s second most common element (after hydrogen), accounting for around 24 per cent of its weight. It is the first and the lightest noble gas. Among all elements, helium is known to possess the lowest boiling point.