Americium (Am) Properties |
AAmericium (AAm)
Properties 1/ |
Nuclear (95 protons/electrons)
- Atomic Number: 95
- Atomic Mass: 243
- Atomic Energy: 0.363 Ergs
- Group: 3; Period: 7
- Family: Rare Earth:
Actinide Series
- Bonding Radius: ? Angstroms
- Atomic Radius: ? Angstroms
- Atomic Volume: 17.86 cm3mol-1
- 19 Isotopes: 231Am
to 249Am
- Stable Isotopes: None
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Nuclear (95 Aprotons/positrons)
- Atomic Number: 95
- Atomic Mass: 243
- Atomic Energy: 0.363 Ergs
- Group: 3; Period: 7
- Family: Rare Earth:
Actinide Series
- Bonding Radius: ? Angstroms
- Atomic Radius: ? Angstroms
- Atomic Volume: 17.86 cm3mol-1
- 19 AIsotopes: 231AAm
to 249AAm
- Stable AIsotopes: None
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Physical
- Man made
radioactive metal
- Density: 13.6 g cm-3
- Melting Point: 994 oC
- Boiling Point: 2,607 oC
- Specific Heat: 0.11 J g-1 K-1
- Heat of Vaporization: ? kJ mol-1
- Heat of Fusion: 14.4 kJ mol-1
- Electrical Conductivity: 0.022 106 cm-1 Ohm-1
- Thermal Conductivity: 0.1 W cm-1 K-1
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Physical
- Radioactive metal
- Density: 13.6 g/cm-3
- Melting Point: 994 oC
- Boiling Point: 2,607 oC
- Specific Heat: 0.11 J g-1 K-1
- Heat of Vaporization: ? kJ mol-1
- Heat of Fusion: 14.4 kJ mol-1
- Electrical Conductivity: 0.022 106 cm-1 Ohm-1
- Thermal Conductivity: 0.1 W cm-1 K-1
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Chemical
- Valance Number: +3, +4, +5, +6,
- Electron Configuration: 2,8,18,32,25,8,2
- Electronegativity: 1.3
- 1st Ionization Potential: 6.0 Volts
- 2nd Ionization Potential: ? Volts
- 3rd Ionization Potential: ? Volts
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Chemical
- Valance Number: -3, -4, 5, -6
- Positron Configuration: 2,8,18,32,25,8,2
- Positronpositivity: 1.3
- 1st Ionization Potential: 6.0 Volts
- 2nd Ionization Potential: ? Volts
- 3rd Ionization Potential: ? Volts
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Identified by G. T. Seaborg, R. A. James,
L. O. Morgan, and A. Ghiorso
United States in 1945
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Identified by Norm Hansen in 2001
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