95
Am
Americium
(243)
2818322582
#95
Americium
actinide· Solid·243 u
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.
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Identity
- Symbol
- Am
- Atomic Number
- 95
- Atomic Mass
- 243 u
- Category
- actinide
- Block
- f-block
- Period
- 7
- Group
- 3
- Appearance
- silvery white
- Year Discovered
- 1944 CE
- Discovered By
- Glenn T. Seaborg
- Named By
- Americas
Electrons
- Configuration
- [Rn] 5f7 7s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f7
- Shells
- 2, 8, 18, 32, 25, 8, 2
- Electronegativity
- 1.13
- Electron Affinity
- 9.93
- Oxidation States
- +6, +5, +4, +3
- Ionization Energies
- 578
Physical Properties
- State at
- Solid
- Melting Point
- 1449
- Boiling Point
- 2880
- Density
- 12
- Molar Heat
- 62.7 J/(mol·K)
- Crystal Structure
- HEX
- Magnetic Ordering
- Paramagnetic
Mechanical
Thermal & Electrical
- Thermal Conductivity
- 10 W/(m K) W/(m·K)
- Specific Heat
- 120 J/(kg K) J/(g·K)
- Heat of Vaporization
- 238.5 kJ/mol kJ/mol
- Heat of Fusion
- 14.4 kJ/mol kJ/mol
Abundance
- Universe
- 0
- Sun
- 0
- Meteorite
- 0
- Earth's Crust
- 0
- Ocean
- 0
- Human Body
- 0