Template:Infobox americium

Americium, ₉₅Am

Americium
Pronunciation	/ˌæməˈrɪsiəm/ ​(AM-ə-RISS-ee-əm)
Appearance	silvery 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 ↓ (Uqe) plutonium ← americium → curium
Atomic number (Z)	95
Group	group n/a
Period	period 7
Block	f-block
Element category	f-block
Electron configuration	[Rn] 5f7 7s2
Electrons per shell	2, 8, 18, 32, 25, 8, 2
Physical properties
Phase at STP	solid
Melting point	1449 K ​(1176 °C, ​2149 °F)
Boiling point	2880 K ​(2607 °C, ​4725 °F) (calculated)
Density (near r.t.)	12 g/cm3
Heat of fusion	14.39 kJ/mol
Molar heat capacity	62.7 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1239 1356
Atomic properties
Oxidation states	+2, +3, +4, +5, +6, +7 (an amphoteric oxide)
Electronegativity	Pauling scale: 1.3
Ionization energies	1st: 578 kJ/mol
Atomic radius	empirical: 173 pm
Covalent radius	180±6 pm
Spectral lines of americium
Other properties
Natural occurrence	synthetic
Crystal structure	​double hexagonal close-packed (dhcp)
Thermal conductivity	10 W/(m·K)
Electrical resistivity	0.69 µΩ·m
Magnetic ordering	paramagnetic
Magnetic susceptibility	+1000.0·10−6 cm3/mol
CAS Number	7440-35-9
History
Naming	after the Americas
Discovery	Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Main isotopes of americium
Iso­tope Abun­dance Physics:Half-life (t1/2) Decay mode Pro­duct 241Am syn 432.2 y SF – α 237Np 242m1Am syn 141 y IT 242Am α 238Np SF – 243Am syn 7370 y SF – α 239Np

Am data m.p. cat
	in	calc from C	diff	report	ref
C	1176	—	—
K	1449	1449	0
F	2149	2149	0
max precision	0
WD
input	C: 1176, K: 1449, F: 2149
comment

Am data b.p. cat
	in	calc from C	diff	report	ref
C	2607	—	—
K	2880	2880	0
F	4725	4725	0
max precision	0
WD
input	C: 2607, K: 2880, F: 4725
comment	(calculated)

PTChemistry:americium

Pu ← i'box Pu	iso95Am  infobox  isobox	→ Cm i'box Cm
Commons  Wikidata:Q1872  Wiktionary Indexes in PT: § below · Page

[]  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
most stable isotope
Natural occurrence
Phase at STP
Chemistry:Oxidation states
Spectral lines image
Physics:Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03) See also {{Infobox element/symbol-to--navbox}}

References

These references will appear in the article, but this list appears only on this page.

Template:Documentation