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Helium is an element.
If you mean isotope, all elements have isotopes. But the vast majority of elements are made up primarily of one isotope. However, you will get tiny amounts of other isotopes such as Helium "3" in helium samples.
Chlorine has two main isotopes, hence it's fractional Atomic Mass of 35.45 instead of Heliums more rounded number of 4.003.
What else can I help you with?
Why helium is an element?
Helium is an element because it contains only one atom in its simplest form.
Is helium atom a single atom species?
Elements are not species. Helium is an element. Helium can be a single atom.
Is helium inside a balloon a compound?
No, helium inside a balloon is not a compound. Helium is a chemical element and is the second lightest element on the periodic table. It exists as individual helium atoms inside the balloon.
Is helium gas a compound?
No, helium gas is not a compound. Helium is an element, which means it consists of only one type of atom.
How many electrons are in level one of helium?
There are 2 electrons in level one of a helium atom.
How many electrons and prtons are in Helium?
Helium is a non metal element. There are 2 electrons in a single atom.
What substance is made of only one atom?
An element is a pure substance that is made up of only one kind of atom.Elements that can exist as a single atom are the noble gases in Group 18 of the periodic table.
Is hellium a compound?
No, helium is not a compound. It is a monatomic gas, meaning it consists of single atoms of helium.
Is helium a compound molecule?
Helium is a chemical element, not a compound; also helium is monoatomic.
How many elements are in He?
Helium is one element and does not chemically react.
How many elements does helium have?
ONE, Helium is an element, not a molecule.
Are helium and gold examples of pure substances or mixtures?
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.
