Ar
6 compounds have this formula on CompoundList.
- Molar mass
- 39.95g/mol
- Monoisotopic mass
- 40.9645Da
- Atoms
- 1
- Elements
- 1
The formula Ar describes a molecule made of 1 argon atom. It is written in Hill notation: with no carbon present, every element is listed in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- Ar Argon × 1100.00%39.948 × 1 = 39.948 g/mol
Compounds with the formula Ar
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 6 of 6 compounds
Frequently asked questions
What is the molar mass of Ar?
The molar mass of Ar is 39.95 g/mol, calculated from standard atomic weights for 1 argon atom. The monoisotopic mass is 40.9645 Da.
How many compounds have the formula Ar?
CompoundList lists 6 compounds with the molecular formula Ar, including Argon, Argon-39, Argon-36. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.