The origin of the word Cobalt comes from the German word "Kobalt" or "Kobold," which translates as "goblin," "elf" or "evil spirit. Co-60, a commercially important radioisotope, is useful as a radioactive tracer and gamma ray source. Cobalt is a ferromagnetic metal and is used primarily in the production of magnetic and high-strength superalloys. Cobalt produces brilliant blue pigments which have been used since ancient times to color paint and glass. Cobalt is found in cobaltite, erythrite, glaucodot and skutterudite ores. In its elemental form, cobalt has a lustrous gray appearance. Unfortunately, there is no easy way to explain these deviations in the ideal order for each element. Interestingly enough, Tungsten is more stable with an electron arrangement of Xe4f 145d46s2. Cobalt was first discovered by George Brandt in 1732. The electron configuration for chromium is NOT 1s22s22p63s23p63d44s2, but 1s22s22p63s23p63d54s1. Using NOBLE GAS notation write the electron configuration for the chromium(III) ion. The cobalt atom has a radius of 125 pm and a Van der Waals radius of 192 pm. Write the complete electron configuration for the cobalt(III) ion. The number of electrons in each of cobalt's shells is 2, 8, 15, 2 and its electron configuration is 3d 7 4s 2.
Cobalt (atomic symbol: Co, atomic number: 27) is a Block D, Group 9, Period 4 element with an atomic weight of 58.933195. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement. For instance, the ground state electronic configuration of calcium (Z20) is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2. Typical and custom packaging is available. The electronic configuration of cations is assigned by removing electrons first in the outermost p orbital, followed by the s orbital and finally the d orbitals (if any more electrons need to be removed). American Elements produces to many standard grades when applicable, including Mil Spec (military grade) ACS, Reagent and Technical Grade Food, Agricultural and Pharmaceutical Grade Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Chromium Cobalt Tantalum alloy is generally immediately available in most volumes.
Elements can also be introduced into alloys or other systems as compounds such as fluorides, oxides or chlorides or as solutions. The probable (expected) electronic configuration of chromium is 1s2 2s2 2p6 3s2 3p6 3d4 4s2 or Ar 3d4 4s2. Ultra high purity and high purity forms also include metal powder, submicron powder and nanoscale, quantum dots, targets for thin film deposition, pellets for evaporation and single crystal or polycrystalline forms.
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