hydrogen
Helium is classified as a non-metallic element. It is a gas at room temperature and belongs to group 0 which is called the noble gases. It is very a very stable element and has a low density.
Helium is a chemical element and a noble gas, which is a type of matter that exists in a gaseous state at room temperature and pressure.
Helium is a gas used to inflate lighter than air balloons.
No, helium is a pure substance and an element to be more specific. It has a constant composition making it a pure substance and it is homoatomic (has only one type of atom) which makes it an element.
Of the listed items, water and carbon dioxide are compounds, not elements. The others (mercury, iron, helium, oxygen, carbon, and bromine) all have more than one isotope. So none of the listed materials have "one type of atom."
No, helium gas is not a compound. Helium is an element, which means it consists of only one type of atom.
Helium is classified as a non-metallic element. It is a gas at room temperature and belongs to group 0 which is called the noble gases. It is very a very stable element and has a low density.
Helium is a noble gas and is located in the group 18 of the periodic table.
Helium is a noble gas with 2 valence electrons.
helium is a noble gas / inert gas / group 18 element
Helium is a chemical element and a noble gas, which is a type of matter that exists in a gaseous state at room temperature and pressure.
Helium is a gas used to inflate lighter than air balloons.
No, helium is a pure substance and an element to be more specific. It has a constant composition making it a pure substance and it is homoatomic (has only one type of atom) which makes it an element.
No, helium is a pure substance and an element to be more specific. It has a constant composition making it a pure substance and it is homoatomic (has only one type of atom) which makes it an element.
No, helium is a pure substance and an element to be more specific. It has a constant composition making it a pure substance and it is homoatomic (has only one type of atom) which makes it an element.
A mixture: The walls of the balloon are not made of helium, and helium itself never reacts with any elastomeric material suitable for constructing balloons.
They are actually elements so that is pure substances. Mixtures are more than one type of element that are in the same space but not touching. Compounds are like mixtures but they are touching.