- Atomic Radius (Å)
Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas. Americium was first produced in 1944 by the group of Glenn T.Seaborg from Berkeley, California, at the metallurgical laboratory of University of Chicago.
95
Atomic Number
243 u
Atomic Mass
1267.15 K
Melting Point
2880 K
Boiling Point
12 g/cm³
Density
null Å
Atomic Radius
1.8 Å
Covalent Radius
1.3
Electronegativity
5.97 eV
First Ionization Energy
9.93
Electron Affinity
7
Number of Shells
2, 8, 18, 32, 25, 8, 2
Electron Shell Occupations
null J/g
Specific Heat