Svojstva

CAS broj7440-48-4
PubChem CID104730
Atomski radijus125
Atomski volumen6,7
Relativna atomska masa58,933
Blokd
Vrelište2.927
Modul stišljivosti
KategorijaPrijelazni metali
Kristalna strukturaJednostavna heksagonska
BojaSiva
Kovalentni radijus126
Gustoća8,86
Električna otpornost
Elektronska konfiguracija[Ar] 3d7 4s2
Elektrona po ljusci2, 8, 15, 2
Elektronegativnost1,88
Elektroni27
Skupina9
Toplina taljenja16,2
Toplina isparavanja375
Potencijal ionizacije7,881
Magnetsko redanje
Magnetska osjetljivost
Masa58,933
Maseni broj27
Talište1.495
NazivKobalt
Neutroni32
Atomski broj59
Stanja oksidacije-1, 1, 2, 3, 4, 5
Perioda4
Agregacijsko stanjeČvrsto
Poissonov omjer
Protoni27
Modul smicanja
Specifični toplinski kapacitet0,421
SimbolCo
Toplinska vodljivost1
Van der Waalsov radijus
Youngov modul
Obilnost
Zastupljenost u Zemljinoj kori0.003%
Zastupljenost u svemiru0.0003%
Co Kobalt 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
Oko 1630., belgijski kemičar i liječnik Jan Baptist van Helmont raspoznao je klor kao plin.

Elementarni klor je po prvi put pripremio i proučavao švedski kemičar Carl Wilhelm Scheele 1774.

Do 1810., znanstveni konsenzus je bio da je klor spoj koji sadrži kisik.

1811., Sir Humphry Davy je zaključio da je klor novi element. Od grčke riječi chloro, zelenkasto žuta 27 1735 Georg Brandt Sweden From the German word "kobald" meaning "goblin" or evil spirit

Isotopes of Chlorine

Standard Atomic Weight

58.933194(4)

Stabilni izotopi

59Co

Nestabilni izotopi

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.