Template:Infobox americium

Americium,  ₉₅Am

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery white
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Americium in the periodic table
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Atomic number (Z)	95
Group	Template:Infobox element/group
Period	period 7
Block	f-block
Element category	Template:Infobox element/category format
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|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 1.3
[[Ionization energy|Template:Engvar energies]]	1st: 578 kJ/mol
Atomic radius	empirical: 173 pm
Covalent radius	180±6 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
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
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