noun
helium
HEE-lee-um/ˈhiːliəm/
A very light chemical element that is an unreactive gas.
Helium keeps the balloons floating above the tables at the party.
Etymology
Helium was named for the sun because it was first detected in the solar spectrum. Its metal-style ending reflects the early assumption that the element was an alkali metal.
In context
another light gas is Helium. But it's on the very right side, which means it's an inert gas, so it doesn't mix with other elements. You can only find it in its pure shape
More examples
- Unlike hydrogen, helium does not burn.
- The technician uses liquid helium to cool the magnet.
- A small tank supplies helium for the weather balloon.