CAS Number7440-50-8
PubChem CID23978
Атомски радијус128
Молска запремина7,1
Атомска маса63,546
Температура кључања2.562
Bulk Modulus
КатегоријаПрелазни метали
Кристална структураПовршинскицентрична Кубична
БојаБакарно жута
Ковалентни радијус132
Electrical Resistivity
Електронска конфигурација[Ar] 3d10 4s1
Електрони по љусци2, 8, 18, 1
Топлота топљења13,1
Топлота испаравања300
Јонизујући потенцијал7,726
Magnetic Ordering
Magnetic Susceptibility
Mass Number29
Температура топљења1.084,6
Атомски број64
Оксидациона стања1, 2, 3, 4
Poisson Ratio
Shear Modulus
Специфична топлота0,385
Топлотна проводљивост4,01
Van der Waals radius
Young's Modulus
Заступљеност у Земљиној кори0.0068%
Заступљеност у Космосу6×10-6%
Cu Бакар 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. From the English word, potash - pot ashes; Latin kalium, Arab qali, alkali 29 From the Latin word "cuprum" meaning the island of "Cyprus"

Isotopes of Potassium

Standard Atomic Weight


Стабилни изотопи

63Cu 65Cu

Нестабилни изотопи

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.