What is the chemical symbol for erbium
Erbium - symbol Er, atomic number 68 - is a white, silver-light, hexagonally crystallizing, malleable, albeit brittle, metallic chemical element from the group of lanthanoids (rare earths).
Overview: General data on the erbium
The identification feature for the Er atom - and thus for the element erbium - is the number of protons in the atomic nucleus (atomic number or proton number) and - in the uncharged state - the same number of electrons in the atomic shell; this is 68 in each case and determines the atomic number, atomic number or atomic number of the erbium.
The nuclear building blocks of the neutrons ensure differences in the erbium atomic nuclei with the same atomic number. These types of atoms are under the term Erbium isotopes or erbium nuclides (isotope data: see there).
The earthly erbium deposits consist of an isotope mixture; the relative atomic mass is therefore given as 167.259 u.
|He||68||[Xe] 4f12 6s2||2||2||6||2||6||10||2||6||10||3||2||6||2|
The following table lists the binding energies or the ionization energies IE of the erbium, i.e. the energy required in electron volts (eV) to separate a certain electron from an Er atom.
|1. IE:||6.1077 eV||2. IE:||11.93 eV||3. IE:||22.74 eV||4. IE:||42.7 eV||5. IE:||eV||6. IE:||eV|
Electron binding energy
The following table lists the electron binding energies of the individual erbium electrons in the respective orbitals. The values are given in electron volts (eV).
Spectral lines of the erbium
The following figure shows an emission spectrum of erbium with the characteristic spectral lines in the visible wavelength range between 400 and 700 nm:
Normal potential of the erbium:
|E.0 (V)||Nox||Name Ox.||Ox.||e-||⇔||Red.||Name Red.||Nox|
|-2,32||+ III||Erbium (III) cation||He3+||+ 3 e-||⇔||He (s)||Erbium||0|
Material and physical properties of the erbium
The following overview lists some physical data and material properties of the pure erbium metal.
Geochemistry, occurrence, distribution
The concentration of erbium in the earth's crust is around 3.5 mg / kg and in sea water 0.9 ng / l; this means that the element is in 45th position in terms of frequency.
(General information without guarantee of correctness and completeness)
Metallic erbium in dust form is fire and explosive.
H228: Flammable solid!
Safety advice S210: Keep away from heat, hot surfaces, sparks, open flames and other types of ignition sources. Do not smoke.
External information offers
Erbium and erbium compounds
Chemical database: physical and chemical properties, safety data sheets, commercially available substances and compounds; various search criteria including structure search
Geochemistry and biogeochemistry
Information on erbium and erbium minerals. Minerals Atlas
Rare earth minerals
List and percentage composition of the individual rare earths contained in nature occurring minerals
Category: Chemical elements
Updated on 02.02.2020.
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