Research any topic before you write.
Find related topics. | Discover entities. | See connections. | Build a topical map.
Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most abundant gas in Earth's atmosphere, at 0.934% (9340 ppmv). It is more than twice as abundant as water vapor (which averages about 4000 ppmv, but varies greatly), 23 times as abundant as carbon dioxide…
Characters, History, Applications & Art
Explore the main themes, entities and connections around Argon. Start with the topic map, then use the sections below for research and deeper semantic analysis.
Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the full topic structure. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
See the strongest relationship patterns around the current topic before diving into the raw triples.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
gas used ar nitrogen also oxygen air atmosphere inert liquid noble earth's produced chemical stable compounds 40 form atomic 18
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Argon | 36Ar | 0.334% | 1.00 | infobox |
| Argon | 37Ar | trace | 1.00 | infobox |
| Argon | 38Ar | 0.0630% | 1.00 | infobox |
| Argon | 39Ar | trace | 1.00 | infobox |
| Argon | 40Ar | 99.6% | 1.00 | infobox |
| Argon | 41Ar | trace | 1.00 | infobox |
| Argon | 42Ar | synth | 1.00 | infobox |
| Argon | Appearance | colorless gas exhibiting a lilac/violet glow when placed in an electric field | 1.00 | infobox |
| Argon | Atomic number (Z) | 18 | 1.00 | infobox |
| Argon | Atomic radius | empirical: 31 pm | 1.00 | infobox |
| Argon | Block | p-block | 1.00 | infobox |
| Argon | Boiling point | 87.302 K (−185.848 °C, −302.526 °F) | 1.00 | infobox |
| Argon | CAS Number | 7440-37-1 | 1.00 | infobox |
| Argon | Covalent radius | 106±10 pm | 1.00 | infobox |
| Argon | Critical point | 150.687 K, 4.863 MPa | 1.00 | infobox |
| Argon | Crystal structure | face-centered cubic (fcc) (cF4) | 1.00 | infobox |
| Argon | Density (at STP) | 1.784 g/L | 1.00 | infobox |
| Argon | Discovery and first isolation | Lord Rayleigh and William Ramsay (1894) | 1.00 | infobox |
| Argon | Electron configuration | [Ne] 3s2 3p6 | 1.00 | infobox |
| Argon | Electronegativity | Pauling scale: no data | 1.00 | infobox |
| Argon | Electrons per shell | 2, 8, 8 | 1.00 | infobox |
| Argon | Group | group 18 (noble gases) | 1.00 | infobox |
| Argon | Heat of fusion | 1.18 kJ/mol | 1.00 | infobox |
| Argon | Heat of vaporization | 6.53 kJ/mol | 1.00 | infobox |
| Argon | Ionization energies | 1st: 1520.6 kJ/mol | 1.00 | infobox |
| Argon | Ionization energies | 2nd: 2665.8 kJ/mol | 1.00 | infobox |
| Argon | Ionization energies | 3rd: 3931 kJ/mol | 1.00 | infobox |
| Argon | Ionization energies | (more) | 1.00 | infobox |
| Argon | Lattice constant | a = 546.91 pm (at triple point) | 1.00 | infobox |
| Argon | Magnetic ordering | diamagnetic | 1.00 | infobox |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.