Plutonium

Frae Wikipedia
Jump to navigation Jump to search
Plutonium,  94Pu
Twa shiny pellets o plutonium o aboot 3 cm in diameter
General properties
Appearance silvery white, tarnishing to dark gray in air
Mass nummer 244 (most stable isotope)
Plutonium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Sm

Pu

(Uqh)
neptuniumplutoniumamericium
Atomic nummer (Z) 94
Group group n/a
Period period 7
Element category   actinide
Block f-block
Electron confeeguration [Rn] 5f6 7s2
Electrons per shell
2, 8, 18, 32, 24, 8, 2
Pheesical properties
Phase (at STP) solit
Meltin pynt 912.5 K ​(639.4 °C, ​1182.9 °F)
Bylin pynt 3505 K ​(3228 °C, ​5842 °F)
Density (near r.t.) 19.816 g/cm3
when liquid (at m.p.) 16.63 g/cm3
Heat o fusion 2.82 kJ/mol
Heat o vapourisation 333.5 kJ/mol
Molar heat capacity 35.5 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1756 1953 2198 2511 2926 3499
Atomic properties
Oxidation states 8, 7, 6, 5, 4, 3, 2, 1 ​(an amphoteric oxide)
Electronegativity Pauling scale: 1.28
Ionisation energies
  • 1st: 584.7 kJ/mol
Atomic radius empirical: 159 pm
Covalent radius 187±1 pm
Coloyr lines in a spectral range
Spectral lines o Plutonium
Miscellanea
Creestal structurmonoclinic
Monoclinic creestal structur for plutonium
Speed o soond 2260 m/s
Thermal expansion 46.7 µm/(m·K) (at 25 °C)
Thermal conductivity 6.74 W/(m·K)
Electrical resistivity 1.460 µΩ·m (at 0 °C)
Magnetic orderin paramagnetic
Young's modulus 96 GPa
Shear modulus 43 GPa
Poisson ratio 0.21
CAS Nummer 7440-07-5
History
Namin after dwarf planet Pluto, itsel named efter clessical god o the unnerwarld Pluto
Diskivery Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan (1940–1)
Main isotopes o plutonium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
238Pu trace 87.74 y SF
α 234U
239Pu trace 2.41×104 y SF
α 235U
240Pu trace 6.5×103 y SF
α 236U
241Pu syn 14 y β 241Am
SF
242Pu syn 3.73×105 y SF
α 238U
244Pu trace 8.08×107 y α 240U
SF
| references | in Wikidata

Plutonium is a transuranic radioactive chemical element wi seembol Pu an atomic nummer 94.

References[eedit | eedit soorce]