Radon
Rn222.01758 g/mol Calculated
Also called Alphatron, Niton, Radium emanation and Rn.
A radioactive noble gas that seeps from soil into basements and, as the densest gaseous element, gathers in low rooms. The US EPA ranks it second only to smoking as a cause of lung cancer. Element 86.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Other namesfrom sourcePubChem / Wikidata
- Formula and weightcomputedPubChem
- 2D drawingcomputedPubChem structure, drawn by RDKit
Where you encounter it
A pure element or an engineered material, rather than an ingredient in a product.
Sources and notes
- The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.
Properties and sources
Calculated by PubChem
- Molecular formula
- Rn
- Molecular weight
- 222.01758 g/mol
Groups it belongs to
- Category
- Element & material
- Family
- Chemical elements
SMILES
[Rn]PubChem CID 24857 · Wikidata Q1133 · InChIKey SYUHGPGVQRZVTB-UHFFFAOYSA-N · Data refreshed
Questions
- What is Radon?
- A radioactive noble gas that seeps from soil into basements and, as the densest gaseous element, gathers in low rooms. The US EPA ranks it second only to smoking as a cause of lung cancer. Element 86.
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- Data refreshedfrom sourceMoleculeFinder2026-11-09