Proprietăți

CAS Number7440-48-4
PubChem CID104730
Rază atomică125
Volum molar6,7
Masă atomică58,933
Blocd
Punct de fierbere2.927
Bulk Modulus
CategorieMetale de tranziție
Structură cristalinăSistemul Hexagonal
CuloareGri
Rază de covalență126
Densitate8,86
Electrical Resistivity
Configurație electronică[Ar] 3d7 4s2
Electroni pe nivelul de energie2, 8, 15, 2
Electronegativitate1,88
Electrons27
Grupă9
Energie de fuziune16,2
Energie de evaporare375
Potențial de ionizare7,881
Magnetic Ordering
Magnetic Susceptibility
Masa58,933
Mass Number27
Punct de topire1.495
NumeCobalt
Neutroni32
Număr atomic59
Număr de oxidare-1, 1, 2, 3, 4, 5
Perioadă4
FazăSolid
Poisson Ratio
Protoni27
Shear Modulus
Căldură specifică0,421
SimbolCo
Conductivitate termică1
Van der Waals radius
Young's Modulus
Abundență naturală
Abundența în scoarța Pământului0.003%
Abundența în Univers0.0003%
Co Cobalt 27 58.933195 9 4 d 27 1495.0 2870.0 [Ar] 3d7 4s2 2 8 15 2 8.9 0.003% Gray Hexagonal 1.9 1.84 {"1":"760.4","2":"1648","3":"3232","4":"4950","5":"7670","6":"9840","7":"12440","8":"15230","9":"17959","10":"26570","11":"29400","12":"32400","13":"36600","14":"39700","15":"42800","16":"49396","17":"52737","18":"134810","19":"145170","20":"154700","21":"167400","22":"178100","23":"189300","24":"204500","25":"214100","26":"920870","27":"966023"} 761 63.7 126 +2,3 1.25 6.7 16.19 373.3 0.421 100.0 0 Solid, Ferromagnetic, Conductor, TransitionMetal, Metal, Stable, Natural KO-bolt Hard, ductile, lustrous bluish-gray metal. Exists in the earth's curst in cocentrations of about 25 ppm. It has remarkable magnetic properties. Used in many hard alloys; for magnets, ceramics and special glasses. Remains hard up to 982°C. Radioactive cobalt-60 is used in cancer therapy. Occurs in compounds with arsenic, oxygen and sulfur as in cobaltine (CoAsS) and linneite (Co3S4). Pure cobalt is obtained as a byproduct of refining nickel, copper and iron. V6ljxByu9ng Cobalt
Around 1630, chlorine was recognized as a gas by the Belgian chemist and physician Jan Baptist van Helmont.

Elemental chlorine was first prepared and studied in 1774 by Swedish chemist Carl Wilhelm Scheele.

By 1810, the scientific consensus was that chlorine was actually a compound that contained oxygen.

In 1811, Sir Humphry Davy concluded the new gas was in fact a new element. Din cuvântul grecesc chloro, galben-verzui 27 1735 Georg Brandt Sweden From the German word "kobald" meaning "goblin" or evil spirit

Isotopes of Chlorine

Standard Atomic Weight

58.933194(4)

Izotopi stabili

59Co

Izotopi instabili

47Co 48Co 49Co 50Co 51Co 52Co 53Co 54Co 55Co 56Co 57Co 58Co 60Co 61Co 62Co 63Co 64Co 65Co 66Co 67Co 68Co 69Co 70Co 71Co 72Co 73Co 74Co 75Co

Elemental chlorine at high concentrations is extremely dangerous and poisonous
Tree frogs have a chlorine compound in their skin that is a very powerful pain killer
Chlorine is used for producing safe drinking water.

It is also extensively used in the production of paper products, dyestuffs, textiles, petroleum products, medicines, antiseptics, insecticides, food, solvents, paints, plastics, and many other consumer products.

Chlorinated compounds are used mostly for sanitation, pulp bleaching, disinfectants, and textile processing.