Periodic table of the elements
PlutoniumAmericiumCurium
95
Am
Americium
(243)
2
8
18
32
25
8
2
95
Am
Americium
(243)
2
8
18
32
25
8
2
General
NameAmericium
SymbolAm
Number95
Chemical seriesActinides
Group / Period0 / 7
Blockf-block
CAS registry number7440-35-9

Americium is a radioactive element

Physical properties
Statesolid
Density13.67 g/cm3
Melting point1449 K (1176 °C, 2149 °F)
Boiling point2880 K (2607 °C, 4725 °F)
Critical point

Atomic properties
Atomic Weight(243) g/mol
Crystal structurehexagonal
Electronegativity1.13
Atomic radius175 pm
Atomic radius (calculated)
Electron configuration[Rn] 5f7 7s2
Electrons per shell2, 8, 18, 32, 25, 8, 2
Number of protons95
Number of neutrons148

Other languages
SpanishAmericio
PortugueseAmerí­cio
FrenchAméricium
GermanAmericium
ItalianAmericio
RussianАмериций
PolishAmeryk
Chinese
Arabicأمريكيوم
TurkishAmerikyum
DutchAmericium


Periodic table of the elements
PlutoniumAmericiumCurium