# Argon

Argon,  18Ar| ngoi-kôn |
| --- |
|
colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field   Spectral lines of argon |
| Kî-pún sin-sit |
| Miàng, fù-ho |
Argon, Ar |
| ngoi-hìn |
colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field |
| Argon chhai chû-khì-péu ke vi-chi |
|

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 | Ne ↑ **Ar** ↓ Kr |
| Liu̍k ← **Argon** → Kap |

 |

 |
| ngièn-chṳ́ sì-sú |
18 |
| ngièn-chṳ́-liòng (±) |
39.948(1)  |
| ngièn-su lui-phe̍t |   hî-yù hi-thí |
| Chhu̍k, fûn-khî | 18 chhu̍k, p-block  |
| chû-khì |
period 3  |
| thien-chṳ́ phài-lie̍t | [Ne] 3s2 3p6  |
| per shell |
2, 8, 8 |
| vu̍t-lî sin-chṳt |
| Siông |
hi-thí |
| yùng-tiám |
83.81 K ​(−189.34 °C, ​−308.81 °F)  |
| pui-tiám |
87.302 K ​(−185.848 °C, ​−302.526 °F)  |
| me̍t-thu at stp (0 °C and 101.325 kPa) |
1.784 g·L−1 |
|
1.3954 g·cm−3  |
| Sâm-siong-tiám |
83.8058 K, ​68.89 kPa  |
| lìm-kie-tiám |
150.687 K, 4.863 MPa  |
| Yùng-fa-ngie̍t |
1.18 kJ·mol−1  |
| Chîn-fat-ngie̍t |
6.53 kJ·mol−1  |
| Ngie̍t-yùng-liong |
20.85 J·mol−1·K−1  |
| **chîn-hi-ap**

|  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- |
| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| chhai T (K) |   | 47 | 53 | 61 | 71 | 87 |

 |
| Ngièn-chṳ́ sin-chṳt |
| Yông-fa-su | **0** |
| Thien-fu-sin |
Pauling scale: no data  |
| Thien-lì-nèn |
1st: 1520.6 kJ·mol−1  2nd: 2665.8 kJ·mol−1  3rd: 3931 kJ·mol−1  (more)  |
| Khiung-ka pan-kang |
106±10 pm  |
| Van der Waals pan-kang |
188 pm  |
| Miscellanea |
| Chîn-thí keu-chho |  ​face-centered cubic (fcc) |
| Sâng-suk |
323 m·s−1 (gas, at 27 °C) |
| Ngie̍t-chhòn-thô-li̍t |
17.72×10-3  W·m−1·K−1  |
| Chhṳ̀-sin |
diamagnetic  |
| CAS Registry Number |
7440-37-1  |
| Le̍k-sú |
| Hoat-kiàn kap siōng chá ê tông-ūi-sò͘ |
Lord Rayleigh and William Ramsay (1894) |
| Chui vún-thin ke thùng-vi-su |
|
Chú vùn-chông: Argon ke thùng-vi-su |
|

| iso | NA | half-life | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 36Ar | 0.337% | – | (β+β+) | 0.4335 | 36S |
| 37Ar | syn | 35 d | ε | 0.813 | 37Cl |
| 38Ar | 0.063% | 38Ar is stable with 20 neutrons |
| 39Ar | trace | 269 y | β− | 0.565 | 39K |
| 40Ar | 99.600% | 40Ar is stable with 22 neutrons |
| 41Ar | syn | 109.34 min | β− | 2.49 | 41K |
| 42Ar | syn | 32.9 y | β− | 0.600 | 42K |

 |
|
Decay modes in parentheses are predicted, but have not yet been observed |

**Argon** (Hon-ngî: 氬 *yà*) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì **Ar**, ngièn-chṳ́ su-muk he **18**, chhai ngièn-su chû-khì-péu lî-tú phài thi 18 vi.

## Chhâm-kháu chṳ̂-liau