Next up, helium, like in these balloons. Katie: Um, I would say that is pure because it's a single element. Miss Fong: You're exactly right, Katie. Helium is a gas made up of a single element.

"Due to a global helium shortage, all pure helium and balloon gas orders are currently on a full-for-empty basis only and are being fairly allocated to all our customers," it says. Getty Images ...

You're listening to Chemistry in its element brought to you by Chemistry World, the magazine of the Royal Society of Chemistry. Hello, this week we're almost at the top of the periodic table because ...

A few of these elements can be found pure in a natural state ... This diagram shows helium. Is helium a solid, liquid or a gas? Is it made up of atoms or molecules? Helium is a gas made up ...

Under certain conditions they found both neon and helium in the residual gas, and they record one instance in which pure helium was obtained. These results confirm their earlier observations ...

Helium, a colourless, odourless, and non-toxic inert gas is the second most common element in the universe. Despite its abundance in space, helium is a finite resource here on Earth, found only in ...

If an atom has 2 protons, that’s an atom of the element helium. If it has 7 protons ... We also, confusingly, tend to refer to pure substances made of one kind of atom, like chlorine gas ...