This is approximately the sum of the number of protons and neutrons in the nucleus. A percentile rank for the political stability of the top producing country, derived from World Bank governance indicators. Electron configuration The arrangements of electrons above the last (closed shell) noble gas. What is the electron configuration of chromium? Density is the mass of a substance that would fill 1 cm. Compared to the "sexier elements" that are household names like carbon and oxygen, ruthenium is, frankly, a bit obscure.

Medium = substitution is possible but there may be an economic and/or performance impact When cobalt is combined with other metals its strength allow a range of super alloys to be created. In this area the huge multicoloured cobalt minerals deposits tower high, with the shores of dams and streams coloured deep rose with silvery blue veins running through. We hope that you enjoy your visit to this Site. In fact all the way up until the beginning of the 20. Atomic number Cobalt-60 is an isotope used in the treatment of cancer. A measure of how difficult it is to deform a material. A vertical column in the periodic table. The temperature at which the liquid–gas phase change occurs.

Electronic configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 7 4s 2 >> Back to key information about the elementBack to key information about the element 1s2 2s2 2p6 3s2 3p6 3d7 4s2. However, as far as colours go, cobalt has a few more strings to its bow than just this wonderful blue.

Images © Murray Robertson 1999-2011 In large doses cobalt is carcinogenic. Cobalt is an essential trace element, and forms part of the active site of vitamin B12. How do electron configurations affect properties and trends of a compound? It is magnetic. In 1730, chemist Georg Brandt of Stockholm became interested in a dark blue ore from some local copper workings and he eventually proved that it contained a hitherto unrecognised metal and he gave it the name by which its ore was cursed by miners in Germany, where it was sometimes mistaken for a silver ore. The arrangements of electrons above the last (closed shell) noble gas. Cobalt can also colour glass green, while the hydrated form of cobalt chloride is a beautiful deep rose colour. The s,p,d,f configuration for cobalt (Co) is 1s22s22p63s23p64s23d7, determined by the position of the element on the periodic table.

The fact that cobalt retains its magnetism up to high temperatures is also a very favourable trait when the addition of cobalt to a magnetic material can improve its properties at high temperatures. Cobalt it is not found pure in Nature but found in sulphur minerals and usually associated with other transition metals. Cobalt can also sometimes be found in mixed arsenic ores, and it is cobalt's association with arsenic that gives it its name. In particular, cobalt's very high melting point and mechanical strength at high temperatures has seen its extensive use in what is termed 'superalloys'. These values were determined using several different methods. Important ore deposits are found in DR Congo, Canada, Australia, Zambia and Brazil. It is one of only 3 ferromagnetic transition elements along with iron and nickel. The first 2 will be removed from the 4s sublevel, since it is part of cobalt's highest-numbered energy level. Values are given for typical oxidation number and coordination. The oxidation state of an atom is a measure of the degree of oxidation of an atom.

The energy released when an electron is added to the neutral atom and a negative ion is formed. Atoms of the same element with different numbers of neutrons. The tendency of an atom to attract electrons towards itself, expressed on a relative scale. ... Cobalt it is not found pure in Nature but found in sulphur minerals and usually associated with other transition metals.

Before I even thought about the chemistry of colour I developed a love for blue glass, something I still collect to this day.

Values are given for typical oxidation number and coordination.

These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). You may browse, download or print out one copy of the material displayed on the Site for your personal, non-commercial, non-public use, but you must retain all copyright and other proprietary notices contained on the materials. One such magnetic material, samarium cobalt retains its magnetism up to 800°C. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site. Cobalt blue was known even earlier in China and was used for pottery glazes. This is where the artist explains his interpretation of the element and the science behind the picture.

Some elements exist in several different structural forms, called allotropes. Cobalt-60 is a radioactive isotope. Its final elemental configuration is 3d7 4s2. Commercial use of the Images will be charged at a rate based on the particular use, prices on application. The percentage of the world reserves located in the country with the largest reserves.

Because it is magnetically and mechanically hard up to very high temperatures, it has found uses in high-speed motors and turbo machinery. I always find the question 'what's your favourite element' a difficult one. And cobalt alloys and coatings are seen everywhere from drills to saws, from aircraft turbines to prosthetic bone replacements. Atmosphere of Venus mostly contains which of the following gases?

Each allotrope has different physical properties. With the exception of the mining region, cobalt is not very abundant, with only trace amounts in the Earths crust (about 2500 times less than iron). The nodules are manganese minerals that take millions of years to form, and together they contain many tonnes of cobalt. You're listening to Chemistry in its element brought to you by. Cobalt is in the 7th column of the d block and therefore has 7 d electrons d7. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). You may not further copy, alter, distribute or otherwise use any of the materials from this Site without the advance, written consent of the RSC.

Where more than one isotope exists, the value given is the abundance weighted average. Most cobalt is formed as a by-product of nickel refining. The availability of suitable substitutes for a given commodity. First ionisation energyThe minimum energy required to remove an electron from a neutral atom in its ground state.



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