Pure i belive. Allthough its a gass so its probably hard to find unmixed.
Helium does not combine with other elements and pure helium will exist by itself as elemental helium.
Helium is an element. It is a noble gas with the atomic number 2 and is the second lightest element in the periodic table. Helium exists as single atoms and does not form compounds with other elements.
Helium is used as it is/pure. Helium is an inert gas and does not form part of compounds.
No it is not, helium is an element. A compound is a combination of two or more elements.
Helium does not combine with other elements and pure helium will not have carbon dioxide in it.
It is a element
It is an element.
A compound has minimum two different elements.
No. Helium is an element, which makes it a pure substance.
Helium is a gas, except at extremely cold temperatures.
Pure water is a compound as it consists of two elements, hydrogen and oxygen. Its chemical formula is H2O.
A compound is 2 elements chemically combined, though it is unseparatable, it is made up of 2 or more elements. But since a compound cannot be broken down into elements, after the elements are chemically combined, that makes a compound a pure substance