Jump to content

Template:Infobox americium: Difference between revisions

From Wikipedia, the free encyclopedia
Content deleted Content added
No edit summary
Line 83: Line 83:
| na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|432.2 y]]
| na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|432.2 y]]
| dm1=[[spontaneous fission|SF]] | de1=- | pn1= | ps1=-
| dm1=[[spontaneous fission|SF]] | de1=- | pn1= | ps1=-
| dm2=[[alpha decay|α]] | de2=5.638 | pn2=237 | ps2=[[neptunium|Np]] }}
| dm2=[[alpha decay|α]] | de2=5.486 | pn2=237 | ps2=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay3 | mn=242[[nuclear isomer|m]] | sym=Am
{{Elementbox_isotopes_decay3 | mn=242[[nuclear isomer|m]] | sym=Am
| na=[[synthetic radioisotope|syn]] | hl=141 [[year|y]]
| na=[[synthetic radioisotope|syn]] | hl=141 [[year|y]]
Line 92: Line 92:
| na=[[synthetic radioisotope|syn]] | hl=[[1 E11 s|7370 y]]
| na=[[synthetic radioisotope|syn]] | hl=[[1 E11 s|7370 y]]
| dm1=SF | de1=- | pn1= | ps1=-
| dm1=SF | de1=- | pn1= | ps1=-
| dm2=α | de2=5.438 | pn2=239 | ps2=[[neptunium|Np]] }}
| dm2=α | de2=5.275 | pn2=239 | ps2=[[neptunium|Np]] }}
|isotopes comment=
|isotopes comment=
}}<noinclude>[[Category:Periodic table infobox templates|Americium]]</noinclude>
}}<noinclude>[[Category:Periodic table infobox templates|Americium]]</noinclude>

Revision as of 08:39, 10 August 2009

Americium, 00Am
Americium
Pronunciation/ˌæməˈrɪsiəm/ (AM-ə-RISS-ee-əm)
Appearancesilvery white
Mass number[243]
Americium in the periodic table
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Gold Mercury (element) Thallium Lead 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Eu

Am

(Uqp)
plutoniumamericiumcurium
Groupf-block groups (no number)
Periodperiod 7
Block  f-block
Electron configuration[Rn] 5f7 7s2
Electrons per shell2, 8, 18, 32, 25, 8, 2
Physical properties
Phase at STPsolid
Melting point1449 K ​(1176 °C, ​2149 °F)
Boiling point2880 K ​(2607 °C, ​4725 °F)
Density (near r.t.)12 g/cm3
Heat of fusion14.39 kJ/mol
Molar heat capacity62.7 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1239 1356
Atomic properties
Oxidation statescommon: +3
+2,[1] +4,[1] +5,[1] +6,[1] +7
ElectronegativityPauling scale: 1.3
Atomic radiusempirical: 173 pm
Covalent radius180±6 pm
Color lines in a spectral range
Spectral lines of americium
Other properties
Natural occurrencesynthetic
Crystal structurehexagonal
Hexagonal crystal structure for americium
Thermal conductivity10 W/(m⋅K)
Magnetic orderingno data
CAS Number7440-35-9
Isotopes of americium
Main isotopes[2] Decay
abun­dance half-life (t1/2) mode pro­duct
241Am synth 432.2 y α 237Np
SF
242m1Am synth 141 y IT 242Am
α 238Np
SF
243Am synth 7350 y α 239Np
SF
 Category: Americium
| references
  1. ^ a b c d Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 28. ISBN 978-0-08-037941-8.
  2. ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.