د ويکيپېډيا، وړیا پوهنغونډ له خوا
Plutonium, 94Pu Two shiny pellets of Pu about 3 cm in diameter. |
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| Pronunciation | /pluːˈtoʊniəm/
ploo-TOH-nee-əm |
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| Appearance | silvery white, tarnishing to dark gray in air |
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| اټومي شمیره (Z) | 94 |
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| گروپ, پیریود | group n/a, period 7 |
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| بلاک | f-block |
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| Element category | actinide |
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| Mass number | 244 (most stable isotope) |
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| Electron configuration | [Rn] 5f6 7s2 |
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Electrons per shell | 2, 8, 18, 32, 24, 8, 2 |
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| حالت (at STP) | جامد |
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| دويلې کيدو ټکى | 912.5 K (639.4 °C, 1182.9 °F) |
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| يشنا ټکی | 3505 K (3228 °C, 5842 °F) |
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| Density near r.t. | 19.816 g/cm3 |
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| when liquid, at m.p. | 16.63 g/cm3 |
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| Heat of fusion | 2.82 kJ/mol |
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| Heat of vaporization | 333.5 kJ/mol |
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| Molar heat capacity | 35.5 J/(mol·K) |
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Vapor pressure
| P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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| at T (K)
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1756
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1953
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2198
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2511
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2926
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3499
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| Oxidation states | 8, 7, 6, 5, 4, 3, 2, 1 (an amphoteric oxide) |
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| Electronegativity | Pauling scale: 1.28 |
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| Ionization energies | |
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| Atomic radius | empirical: 159 pm |
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| Covalent radius | 187±1 pm |
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| Crystal structure | monoclinic Monoclinic crystal structure for plutonium |
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| Speed of sound | 2260 m/s |
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| Thermal expansion | 46.7 µm/(m·K) (at 25 °C) |
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| د تودوخې تېرېدنه | 6.74 W/(m·K) |
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| Electrical resistivity | 1.460 µΩ·m (at 0 °C) |
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| Magnetic ordering | paramagnetic |
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| Young's modulus | 96 GPa |
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| Shear modulus | 43 GPa |
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| Poisson ratio | 0.21 |
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| CAS Number | 7440-07-5 |
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| Naming | after dwarf planet Pluto, itself named after classical god of the underworld Pluto |
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| Discovery | Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan (1940–1) |
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| | references | in Wikidata |
Element navigation
سرچينې
د سرچينو همدا لړليک په ليکنه کې نه ښکاري.
کينډۍ لاسوند[جوړول]