139La Isotope Applications:
Lanthanum-139 isotope (La-139 isotope, 139La isotope)
- 139La isotope is used for Cerium-139 (Ce-139 isotope, 139Ce isotope) radionuclide (radioisotope) production (can be used in life science for healthcare and medical applications and pharmaceuticals industries);
- 139La isotope is used for research in nuclear physics;
139La isotope is available to order from BuyIsotope.com in 139La oxide (La2O3) chemical form. Please contact us via request a 139La quote BuyIsotope.com to order 139La isotope, to get 139La price and to buy 139La isotope.
Properties of 139La Isotope:
| Properties of 139La Isotope: | 139La |
|---|---|
| Natural Abundance (%) | 99.911 |
| Atomic Mass (Da) | 138.9063533 |
| Relative Isotopic Mass | 138.9063533 |
| Neutron Number (N) | 82 |
| Atomic Number (Z) | 57 |
| Mass Number (A) | 139 |
| Nucleon Number (A) | 139 |
| Proton Number (Z) | 57 |
| Half-life | Stable |
| Spin | 3.5 |
| Quadrupole Moment | 0.2 |
| g-factor (g value) | 0.795156 |
| Group | 3 |
| Period | 6 |
| Electron Configuration Block | d |
| Melting Point (K) | 1193 |
| Boiling Point (K) | 3737 |
| Specific Heat | 0.197 |
| Heat of Formation | 431 |
| Thermal Conductivity | 13.4 |
| Dipole Polarizability | 215 |
| Electron Affinity (kJ/mole) | 0.557546 |
| Electronegativity (Pauling scale) | 1.1 |
| Atomic Radius (pm) | 187 |
| Covalent Radius (pm) | 195 |
| VDW Radius (pm) | 278 |
| Lattice Constant | 3.75 |
| Crystal Structure | DHCP |
| Jmol color | #70d4ff |
139La Information
Lanthanum is a silvery metallic element belonging to group 3 of the periodic table and oft considered to be one of the lanthanoids. It is found in some rare-earth minerals. 39 isotopes of lanthanum exist. There are 2 natural isotopes of lanthanum. One of them La-139 is stable and another one La-138 has a half-life of 10^10 to 10^15 years. It resembles the lanthanoids chemically. This element has a low to moderate level of toxicity, and should be handled with care. Lanthanum was discovered by C.G. Mosander in 1839.
Lanthanum is used in the electrodes of high-intensity, carbon-arc lights. Also it is used in the production of high-grade europium metal. Because this element gives glass refractive properties, it is used in expensive camera lenses.
FAQ about 139La Isotope:
What is 139La isotope natural abundance?
Answer: 99.911 %
What is atomic mass for 139La isotope?
Answer: 138.90635 Da
What is isotopic mass for 139La isotope?
Answer: 138.90635
How many neutrons does 139La isotope have?
Answer: 82
How many protons does 139La isotope have?
Answer: 57
How many electrons does 139La isotope have?
Answer: 57
What is atomic number for 139La isotope?
Answer: 57
Is 139La isotope stable?
Answer: Yes
Is 139La isotope radioactive?
Answer: No
