Barium Element Properties, Alkali earth metals Group, Periodic Table of the Elements
Barium
|
Barium Element Properties |
 | | General |
| Name | Barium |
| Symbol | Ba |
| Number | 56 |
| Group Number | 2 |
| Group | Alkali earth metals |
| Block | s |
| Density | 3.51 g/cm3 |
| Atomic Weight | 137.33 g/mol |
| Atomic Volume | 39.24 cm3/mol |
| Discover | 1808 |
|
| States |
| State | Solid |
| Melting Point | 1000 K |
| Boiling Point | 2170 K |
| Triple Point | Nil |
| Critical Point | Nil |
| Heat of Fusion | 7.12 kJ/mol |
| Heat of Vaporization | 140.3 kJ/mol |
|
| Energies |
| First Ionization Energy | 502.9 kJ/mole |
| Second Ionization Energy | 965.2 kJ/mole |
| Third Ionization Energy | Nil |
| Electronegativity | 0.89 |
| Electron Affinity | Nil |
| Specific Heat | 0.204 J/gK |
| Heat Atomization | 180 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,18,18,8,2 |
| Electron Configuration | [Xe] 6s2 |
| Minimum Oxidation Number | 0 |
| Maximum Oxidation Number | 2 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 2 |
|
| Appearance and Characteristics |
| Crystal Structure | cubic body centered |
| Characteristics | soft |
| Color | silvery-white |
| Uses | X-ray imaging agnt(BaSO4) |
| Hardness | Nil |
| Toxicity | None |
|
| Reactions |
| Reaction with Air | vigorous,wt/ht=>BaO,Ba2N3 |
| Reaction with 6M HCl | vigorous, =>H2, BaCl2 |
| Reaction with 15M HNO3 | mild, =>Ba(NO3)2 |
| Reaction with 6M NaOH | passivated |
|
| Other Forms |
| Number of Isotopes | 7 |
| Hydride | BaH2 |
| Oxide | BaO |
| Chloride | BaCl2 |
|
| Radius |
| Atomic Radius | 222 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | 149 pm |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | Nil |
|
| Conductivity |
| Thermal Conductivity | 18.4 J/m-sec-deg |
| Electrical Conductivity | Nil |
| Polarizability | 39.7 A3 |
|
| Abundance |
| Source | Barite (sulfate) |
| Relation Abundance Solar System | 0.652 log |
| Abundance Earth's Crust | 2.6 log |
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