Proprietăți

CAS Number7440-50-8
PubChem CID23978
Rază atomică128
Volum molar7,1
Masă atomică63,546
Blocd
Punct de fierbere2.562
Bulk Modulus
CategorieMetale de tranziție
Structură cristalinăFață Centrată Cubic
CuloareCupru
Rază de covalență132
Densitate8,96
Electrical Resistivity
Configurație electronică[Ar] 3d10 4s1
Electroni pe nivelul de energie2, 8, 18, 1
Electronegativitate1,9
Electrons29
Grupă11
Energie de fuziune13,1
Energie de evaporare300
Potențial de ionizare7,726
Magnetic Ordering
Magnetic Susceptibility
Masa63,546
Mass Number29
Punct de topire1.084,6
NumeCupru
Neutroni35
Număr atomic64
Număr de oxidare1, 2, 3, 4
Perioadă4
FazăSolid
Poisson Ratio
Protoni29
Shear Modulus
Căldură specifică0,385
SimbolCu
Conductivitate termică4,01
Van der Waals radius
Young's Modulus
Abundență naturală
Abundența în scoarța Pământului0.0068%
Abundența în Univers6×10-6%
Cu Cupru 29 63.546 11 4 d 29 1083.0 2567.0 [Ar] 3d10 4s1 2 8 18 1 8.96 0.0068% Copper Cubic: Face centered 1.9 1.85 {"1":"745.5","2":"1957.9","3":"3555","4":"5536","5":"7700","6":"9900","7":"13400","8":"16000","9":"19200","10":"22400","11":"25600","12":"35600","13":"38700","14":"42000","15":"46700","16":"50200","17":"53700","18":"61100","19":"64702","20":"163700","21":"174100","22":"184900","23":"198800","24":"210500","25":"222700","26":"239100","27":"249660","28":"1067358","29":"1116105"} 746 118.4 138 +2,1 1.28 7.1 13.14 300.5 0.385 401.0 0 Solid, Diamagnetic, Conductor, TransitionMetal, Metal, Stable, Natural KOP-er Malleable, ductile, reddish-brown metal. Most often used as an electrical conductor. Also used in the manufacture of water pipes. Its alloys are used in jewelry and for coins. Pure copper occurs rarely in nature. Usually found in sulfides as in chalcopyrite (CuFeS2), coveline (CuS), chalcosine (Cu2S) or oxides like cuprite (Cu2O). sWvp_Z2kfYs Copper
Potassium's symbol K comes from 'kalium' the name of the element in Germany and Scandinavia.

Potassium metal was first isolated in 1807 by Sir Humphry Davy, who derived it from caustic potash by the use of electrolysis of the molten salt with the newly discovered voltaic pile.

Potassium was the first metal that was isolated by electrolysis. Din cuvântul englez potash - cenușa de pe oală; latină kalium, arabă qali, alcaliu 29 From the Latin word "cuprum" meaning the island of "Cyprus"

Isotopes of Potassium

Standard Atomic Weight

63.546(3)

Izotopi stabili

63Cu 65Cu

Izotopi instabili

52Cu 53Cu 54Cu 55Cu 56Cu 57Cu 58Cu 59Cu 60Cu 61Cu 62Cu 64Cu 66Cu 67Cu 68Cu 69Cu 70Cu 71Cu 72Cu 73Cu 74Cu 75Cu 76Cu 77Cu 78Cu 79Cu 80Cu

Potassium must be handled with great care with full skin and eye protection
People whose diets are low in potassium can suffer from hypokalemia
The greatest demand for potash has been in its use for fertilizers.

Potassium is an essential constituent for plant growth and is found in most soils.

Potassium nitrate is the main explosive ingredient in gunpowder.

Potassium hydroxide is used in the manufacture of soft soaps and as an electrolyte in alkaline batteries.