Americium Element Properties, Rare Earth, Actinides Group, Periodic Table of the Elements
Americium
|
Americium Element Properties |
 | | General |
| Name | Americium |
| Symbol | Am |
| Number | 95 |
| Group Number | NA |
| Group | Rare Earth, Actinides |
| Block | f |
| Density | 13.6 g/cm3 |
| Atomic Weight | 243 g/mol |
| Atomic Volume | 17.86 cm3/mol |
| Discover | 1944 |
|
| States |
| State | Solid |
| Melting Point | 1449 K |
| Boiling Point | 2880 K |
| Triple Point | Nil |
| Critical Point | Nil |
| Heat of Fusion | 14.39 kJ/mol |
| Heat of Vaporization | 62.7 kJ/mol |
|
| Energies |
| First Ionization Energy | 578 kJ/mole |
| Second Ionization Energy | Nil |
| Third Ionization Energy | Nil |
| Electronegativity | 1.3 |
| Electron Affinity | Nil |
| Specific Heat | 0.11 J/gK |
| Heat Atomization | Nil |
|
| Oxidation and Electrons |
| Shells | 2,8,18,32,25,8,2 |
| Electron Configuration | [Rn] 5f7 7s2 |
| Minimum Oxidation Number | 0 |
| Maximum Oxidation Number | 6 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 3 |
|
| Appearance and Characteristics |
| Crystal Structure | hexagonal |
| Characteristics | Radioactive |
| Color | silvery-white |
| Uses | smoke detector |
| Hardness | Nil |
| Toxicity | None |
|
| Reactions |
| Reaction with Air | None |
| Reaction with 6M HCl | None |
| Reaction with 15M HNO3 | None |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 0 |
| Hydride | AmH2 AmH3 |
| Oxide | AmO Am2O3 AmO2 |
| Chloride | AmCl2 AmCl3 |
|
| Radius |
| Atomic Radius | 173 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | 111.5 pm |
|
| Conductivity |
| Thermal Conductivity | Nil |
| Electrical Conductivity | Nil |
| Polarizability | 23.3 A3 |
|
| Abundance |
| Source | Synthetic |
| Relation Abundance Solar System | Nil |
| Abundance Earth's Crust | Nil |
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