# Uranyo

| Uranium |
| --- |
| **92U** |
|

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| Nd ↑ **U** ↓ (Uqq) |

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Periodic table |

 |  |
|  | protactinium ← **uranium** → neptunium |

 |
| Panagway |
| silvery gray metallic; corrodes to a spalling black oxide coat in air  |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan | uranium, U, 92 |
| Paglitok | /jʊˈreɪniəm/ [[Help:Pronunciation respelling key|*ew-**Plantilya:Smallcaps all**-nee-əm*]] |
| Kategoriyang elemento | aktinido |
| Group, period, block | [[group element|]], 7, f |
| Gibug-aton sa atomo | 238.02891(3) |
| Kontorno sa elektron | [Rn] 5f3 6d1 7s2 2, 8, 18, 32, 21, 9, 2
Electron shells of uranium (2, 8, 18, 32, 21, 9, 2) |
| History |
| Pagkadiskobre | Martin Heinrich Klaproth   (1789)  |
| First isolation | Eugène-Melchior Péligot   (1841)  |
| Physical properties |
| Phase | magahi |
| Density (near r.t.) | 19.1 g·cm−3 |
| Liquid density at m.p. | 17.3 g·cm−3 |
| Melting point | 1405.3 K, 1132.2 °C, 2070 °F |
| Boiling point | 4404 K, 4131 °C, 7468 °F |
| Heat of fusion | 9.14 kJ·mol−1 |
| Heat of vaporization | 417.1 kJ·mol−1 |
| Molar heat capacity | 27.665 J·mol−1·K−1 |
| Vapor pressure |
|

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

 |
| Atomic properties |
| Oxidation states | **6**, 5, 4, 3, 2 (weakly basic oxide) |
| Electronegativity | 1.38 (Pauling scale) |
| Ionization energies | 1st: 597.6 kJ·mol−1 |
| 2nd: 1420 kJ·mol−1 |
| Atomic radius | 156 pm |
| Covalent radius | 196±7 pm |
| Van der Waals radius | 186 pm |
| Miscellanea |
| Crystal structure | orthorhombic
 |
| Magnetic ordering | paramagnetic |
| Electrical resistivity | (0 °C) 0.280 µΩ·m |
| Thermal conductivity | 27.5 W·m−1·K−1 |
| Thermal expansion | (25 °C) 13.9 µm·m−1·K−1 |
| Speed of sound (thin rod) | (20 °C) 3155 m·s−1 |
| Young's modulus | 208 GPa |
| Shear modulus | 111 GPa |
| Bulk modulus | 100 GPa |
| Poisson ratio | 0.23 |
| CAS registry number | 7440-61-1 |
| Most stable isotopes |
| Main article: Isotopes of uranium |
|

| iso | NA | half-life | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 232U | trace | 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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| * v
* t
* e
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Ang **uranyo** (Iningles *uranium*) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga **U** ug kaiphan nga atomik 92. Ang uranyo mao ang aktinido.

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