# Argon

*This article pertains to the chemical element. For other uses, see argon (disambiguation).*

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| --- | --- | --- | --- | --- | --- |
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|  |  |
| --- | --- |
| 18 | chlorine ← argon → potassium |
| Ne ↑ Ar ↓ Kr |

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| --- |
| Periodic Table - Extended Periodic Table |

 |

 |
| General |
| Lagyu, Symbulu, Numeru | argon, Ar, 18 |
| Chemical series | noble gases |
| Lupung, Period, Bloki | 18, 3, p |
| Itsura | colorless  |
| Standard atomic weight | 39.948(1) g·mol−1 |
| Electron configuration | [Ne] 3s2 3p6 |
| Electrons per shell | 2, 8, 8 |
| Physical properties |
| Phase | gas (At room temperature) |
| Density | (0 °C, 101.325 kPa) 1.784 g/L |
| Melting point | 83.80 K (-189.35 °C, -308.83 °F) |
| Boiling point | 87.30 K (-185.85 °C, -302.53 °F) |
| Triple point | 83.8058 K, 69 kPa |
| Critical point | 150.87 K, 4.898 MPa |
| Heat of fusion | 1.18 kJ·mol−1 |
| Heat of vaporization | 6.43 kJ·mol−1 |
| Heat capacity | (25 °C) 20.786 J·mol−1·K−1 |
|

Vapor pressure| *P*/Pa | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| at *T*/K |   | 47 | 53 | 61 | 71 | 87 |

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| Atomic properties |
| Crystal structure | cubic face centered |
| Oxidation states | 0 |
| Electronegativity | no data (Pauling scale) |
| Ionization energies (more) | 1st: 1520.6 kJ·mol−1 |
| 2nd: 2665.8 kJ·mol−1 |
| 3rd: 3931 kJ·mol−1 |
| Atomic radius | 71 pm |
| Atomic radius (calc.) | 71 pm |
| Covalent radius | 97 pm |
| Van der Waals radius | 188 pm |
| Miscellaneous |
| Magnetic ordering | nonmagnetic |
| Thermal conductivity | (300 K) 17.72 m W·m−1·K−1 |
| Speed of sound | (gas, 27 °C) 323 m/s |
| CAS registry number | 7440-37-1 |
| Selected isotopes |
|

Main article: Isotopes of argon| iso | NA | half-life | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 36Ar | 0.337% | Ing Ar stable ya kambe ning 18 neutrons |
| 37Ar | syn | 35 d | ε | ? | 37Cl |
| 38Ar | 0.063% | Ing Ar stable ya kambe ning 20 neutrons |
| 39Ar | syn | 269 y | β- | 0.565 | 39K |
| 40Ar | 99.600% | Ing Ar stable ya kambe ning 22 neutrons |
| 41Ar | syn | 109.34 min | β- | 2.49 | 41K |
| 42Ar | syn | 32.9 y | β- | 0.600 | 42K |

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| References |
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## Dalerayan

### Aliwang dalerayan

* Los Alamos National Laboratory – Argon Archived Setyembri 29, 2006 at the Wayback Machine
* USGS Periodic Table - Argon Archived Setyembri 23, 2006 at the Wayback Machine
* Emsley, J., Nature’s Building Blocks; Oxford University Press: Oxford, NY, 2001; pp. 35-39.
* Brown, T. L.; Bursten, B. E.; LeMay, H. E., In *Chemistry: The Central Science*, 10th ed.; Challice, J.; Draper, P.; Folchetti, N. et al.; Eds.; Pearson Education, Inc.: Upper Saddle River, NJ, 2006; pp. 276 and 289.
* Triple point temperature: 83.8058 K - Preston-Thomas, H. (1990). "The International Temperature Scale of 1990 (ITS-90)". *Metrologia* **27**: 3-10. Archived from the original. You must specify the date the archive was made using the `|archivedate=` parameter.
* Triple point pressure: 69 kPa -  (2005) "Section 4, Properties of the Elements and Inorganic Compounds; Melting, boiling, triple, and critical temperatures of the elements", *CRC Handbook of Chemistry and Physics*, 85th edition, Boca Raton, Florida: CRC Press.

## Ding suglung Palual

 Ing Wikimedia Commons atin yang mediang maki kaugnayan kang/king: Argon

Paintunan me ing argon king
Wiktionary, ing timawang diccionariu.

* WebElements.com – Argon
* Diving applications: Why Argon? Archived Juliu 1, 2008 at the Wayback Machine
* Argon Ar Properties, Uses, Applications
* Computational Chemistry Wiki