Lanthanum-138 isotope (La-138 isotope, 138La isotope)
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|Properties of 138La Isotope:||138La|
|Natural Abundance (%)||0.089|
|Atomic Mass (Da)||137.907112|
|Relative Isotopic Mass||137.907112|
|Neutron Number (N)||81|
|Atomic Number (Z)||57|
|Mass Number (A)||138|
|Nucleon Number (A)||138|
|Proton Number (Z)||57|
|g-factor (g value)||0.742729|
|Electron Configuration Block||d|
|Melting Point (K)||1193|
|Boiling Point (K)||3737|
|Heat of Formation||431|
|Electron Affinity (kJ/mole)||0.557546|
|Electronegativity (Pauling scale)||1.1|
|Atomic Radius (pm)||187|
|Covalent Radius (pm)||195|
|VDW Radius (pm)||278|
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.
What is 138La isotope natural abundance?
Answer: 0.089 %
What is atomic mass for 138La isotope?
Answer: 137.90711 Da
What is isotopic mass for 138La isotope?
How many neutrons does 138La isotope have?
How many protons does 138La isotope have?
How many electrons does 138La isotope have?
What is atomic number for 138La isotope?
Is 138La isotope stable?
Is 138La isotope radioactive?