Kobalt (Co)

Properties

Abundance
CAS Number	7440-48-4
PubChem CID	104730
Atomic Radius	125
Atomic Volume	6,7
Atomic Weight	58,933
Block	d
Boiling Point	2.927
Bulk Modulus
Category	Transition metals
Crystal Structure	Simple Hexagonal
Color	Gray
Covalent Radius	126
Density	8,86
Electrical Resistivity
Electron Configuration	[Ar] 3d⁷ 4s²
Electrons per shell	2, 8, 15, 2
Electronegativity	1,88
Electrons	27
Group	9
Heat of Fusion	16,2
Heat of Vaporization	375
Ionization Potential	7,881
Magnetic Ordering
Magnetic Susceptibility
Mass	58,933
Mass Number	27
Melting Point	1.495
Name	Kobalt
Neutrons	32
Atomic Number	59
Oxidation States	-1, 1, 2, 3, 4, 5
Period	4
Phase	Solid
Poisson Ratio
Protons	27
Shear Modulus
Specific Heat Capacity	0,421
Symbol	Co
Thermal Conductivity	1
Van der Waals radius
Young's Modulus
Abundance in Earth's crust	0.003%
Abundance in Universe	0.0003%

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

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. From the Greek word chloro, greenish yellow 27 1735 Georg Brandt Sweden From the German word "kobald" meaning "goblin" or evil spirit

Isotopes of Chlorine

Standard Atomic Weight

58.933194(4)

Stable Isotopes

⁵⁹Co

Unstable Isotopes

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.

Kobalt on ChemicalAid