 |
| General |
| Name | Strontium |
| Symbol | Sr |
| Number | 38 |
| Group Number | 2 |
| Group | Alkali earth metals |
| Block | s |
| Density | 2.6 g/cm3 |
| Atomic Weight | 87.62 g/mol |
| Atomic Volume | 33.7 cm3/mol |
| Discover | 1808 |
|
| States |
| State | Solid |
| Melting Point | 1050 K |
| Boiling Point | 1655 K |
| Triple Point | Nil |
| Critical Point | Nil |
| Heat of Fusion | 7.43 kJ/mol |
| Heat of Vaporization | 136.9 kJ/mol |
|
| Energies |
| First Ionization Energy | 549.5 kJ/mole |
| Second Ionization Energy | 1064.2 kJ/mole |
| Third Ionization Energy | 4206.7 kJ/mole |
| Electronegativity | 0.95 |
| Electron Affinity | Nil |
| Specific Heat | 0.30 J/gK |
| Heat Atomization | 164 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,18,8,2 |
| Electron Configuration | [Kr] 5s2 |
| Minimum Oxidation Number | 0 |
| Maximum Oxidation Number | 2 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 2 |
|
| Appearance and Characteristics |
| Crystal Structure | cubic face centered |
| Characteristics | tarnishes |
| Color | silvery |
| Uses | fireworks (red flame) |
| Hardness | 1.8 mohs |
| Toxicity | None |
|
| Reactions |
| Reaction with Air | vigorous, =>SrO, Sr2N3 |
| Reaction with 6M HCl | vigorous, =>H2, SrCl2 |
| Reaction with 15M HNO3 | vigorous, =>Sr(NO3)2, H2 |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 4 |
| Hydride | SrH2 |
| Oxide | SrO |
| Chloride | SrCl2 |
|
| Radius |
| Atomic Radius | 215 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | 132 pm |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | Nil |
|
| Conductivity |
| Thermal Conductivity | 35.4 J/m-sec-deg |
| Electrical Conductivity | 43.478 1/mohm-cm |
| Polarizability | 27.6 A3 |
|
| Abundance |
| Source | Celestite (sulfide) |
| Relation Abundance Solar System | 1.371 log |
| Abundance Earth's Crust | 2.6 log |
|
