# Uranium

Uranium,  92U|  |
| Ki-pún sèng-chit |
| Miâ, hû-hō | uranium, U |
| Gōa-hêng | silvery gray metallic; corrodes to a spalling black oxide coat in air |
| Uranium tī chiu-kî-piáu lāi ê ūi-tì |
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 | Nd ↑ **U** ↓ (Uqq) |
| protactinium ← **uranium** → neptunium |

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 |
| Goân-chú-hoan | 92 |
| Goân-chú-liōng (±) | 238.02891(3)  |
| Goân-sò͘ lūi-pia̍t |   actinium-hē |
| Cho̍k, hun-khu | n/a, f khu  |
| Chiu-kî | tē 7 chiu-kî  |
| Tiān-chú pâi-lia̍t | [Rn] 5f3 6d1 7s2  |
| per shell | 2, 8, 18, 32, 21, 9, 2 |
| Bu̍t-lí sèng-chit |
| Siòng | kò͘-thé |
| Iûⁿ-tiám | 1405.3 K ​(1132.2 °C, ​2070 °F)  |
| Hut-tiám | 4404 K ​(4131 °C, ​7468 °F)  |
| Bi̍t-tō͘  (sek-un) | 19.1 g·cm−3 |
| 17.3 g·cm−3  |
| Iûⁿ-hoà-jia̍t | 9.14 kJ·mol−1  |
| Cheng-hoat-jia̍t | 417.1 kJ·mol−1  |
| Jia̍t-iông-liōng | 27.665 J·mol−1·K−1  |
| **cheng-khì-ap**

|  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- |
| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| tī T (K) | 2325 | 2564 | 2859 | 3234 | 3727 | 4402 |

 |
| Goân-chú sèng-chit |
| Sng-hòa-sò͘ | **6**, 5, 4, 3, 2, 1 ​(a weakly basic oxide) |
| Tiān-hū-tō͘ | Pauling scale: 1.38  |
| Tiān-lī-lêng | 1st: 597.6 kJ·mol−1  2nd: 1420 kJ·mol−1   |
| Goân-chú pòaⁿ-kèng | empirical: 156 pm  |
| Kiōng-kè pòaⁿ-kèng | 196±7 pm  |
| Van der Waals pòaⁿ-kèng | 186 pm  |
| Cha̍p-lio̍k |
| Chiⁿ-thé kò͘-chō |  ​orthorhombic |
| Siaⁿ-sok  (sòe kùn-á) | 3155 m·s−1 (at 20 °C)  |
| Jia̍t-phòng-tiòng | 13.9 µm·m−1·K−1 (at 25 °C)  |
| Jia̍t-thoân-tō-lu̍t | 27.5 W·m−1·K−1  |
| Tiān-chó͘-lu̍t | 0.280 µΩ·m (at 0 °C)  |
| Chû-sèng | paramagnetic  |
| Young hē-sò͘ | 208 GPa  |
| Shear hē-sò͘ | 111 GPa  |
| Bulk hē-sò͘ | 100 GPa  |
| Poisson pí | 0.23  |
| Vickers ngē-tō͘ | 1960–2500 MPa  |
| Brinell ngē-tō͘ | 2350–3850 MPa  |
| CAS teng-kì pian-hō | 7440-61-1  |
| Le̍k-sú |
| Hō-miâ | after planet Uranus, itself named after Greek god of the sky Uranus |
| Hoat-hiān | Martin Heinrich Klaproth (1789) |
| Siōng chá hû-lî | Eugène-Melchior Péligot (1841) |
| Chòe ún-tēng ê tông-ūi-sò͘ |
| Chú bûn-chiong: uranium ê tông-ūi-sò͘ |
|

| iso | NA | half-life | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 232U | syn | 68.9 y | SF | – | – |
| α | 5.414 | 228Th |
| 233U | trace | 1.592×105 y | SF | 197.93 | – |
| α | 4.909 | 229Th |
| 234U | 0.005% | 2.455×105 y | SF | 197.78 | – |
| α | 4.859 | 230Th |
| 235U | 0.720% | 7.04×108 y | SF | 202.48 | – |
| α | 4.679 | 231Th |
| 236U | trace | 2.342×107 y | SF | 201.82 | – |
| α | 4.572 | 232Th |
| 238U | 99.274% | 4.468×109 y | α | 4.270 | 234Th |
| SF | 205.87 | – |
| β−β− | – | 238Pu |

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**Uranium** (Óa-im: "*u-lá-ní-ùm*") sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 92, hoà-ha̍k hû-hō sī U.

## Chham-khó