Template:Infobox americium

Americium, ₉₅Am

Americium
Pronunciation	/ˌæməˈrɪsiəm/ ​(AM-ə-RISS-ee-əm)
Appearance	sillery white
Mass number	[243]
Americium 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 Eu ↑ Am ↓ (Uqs) plutonium ← americium → curium
Atomic nummer (Z)	95
Group	group n/a
Period	period 7
Block	f-block
Element category	Actinide
Electron confeeguration	[Rn] 5f7 7s2
Electrons per shell	2, 8, 18, 32, 25, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	1449 K ​(1176 °C, ​2149 °F)
Bylin pynt	2880 K ​(2607 °C, ​4725 °F) (calculatit)
Density (near r.t.)	12 g/cm3
Heat o fusion	14.39 kJ/mol
Molar heat capacity	62.7 J/(mol·K)
Vapour pressur P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1239 1356
Atomic properties
Oxidation states	+2, +3, +4, +5, +6, +7 (an amphoteric oxide)
Electronegativity	Pauling scale: 1.3
Ionisation energies	1st: 578 kJ/mol
Atomic radius	empirical: 173 pm
Covalent radius	180±6 pm
Colour lines in a spectral range Spectral lines o americium
Ither properties
Naitural occurrence	synthetic
Creestal structur	​dooble hexagonal close packed Dooble hexagonal close packed creestal structur for americium
Thermal conductivity	10 W/(m·K)
Electrical resistivity	0.69 µΩ·m
Magnetic orderin	paramagnetic
CAS Nummer	7440-35-9
History
Namin	efter the Americas
Diskivery	Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Main isotopes o americium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 241Am syn 432.2 y SF – α 237Np 242mAm syn 141 y IT 242Am α 238Np SF – 243Am syn 7370 y SF – α 239Np

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1176	—	—
K	1449	1449	0
F	2149	2149	0
WD	!
input	C: 1176, K: 1449, F: 2149
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	2607	—	—
K	2880	2880	0
F	4725	4725	0
WD	!
input	C: 2607, K: 2880, F: 4725
comment	(calculatit)

References

Thir references will appear in the airticle, but this list appears anerly on this page.

Template documentation[create] [purge]

Editors can experiment in this template's sandbox (create | mirror) and testcases (create) pages.
Subpages of this template.