Kalium
19
K
Groep
1
Periode
4
Blok
s
Protrone
Elektrone
Neutrone
19
19
20
Algemene Eienskappe
Atoom Nommer
19
Atoommassa
39,0983
Massa Nommer
39
Kategorie
Alkalimetale
Kleur
Silver
Radioaktief
Nee
From the English word, potash - pot ashes; Latin kalium, Arab qali, alkali
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
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.
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.
Elektrone per skil
2, 8, 8, 1
Elektronkonfigurasie
[Ar] 4s1
People whose diets are low in potassium can suffer from hypokalemia
Fisiese Eienskappe
Fase
Soliede
Digtheid
0,862 g/cm3
Smeltpunt
336,53 K | 63,38 °C | 146,08 °F
Kookpunt
1032,15 K | 759 °C | 1398,2 °F
Heat of Fusion
2,33 kJ/mol
Heat of Vaporization
76,9 kJ/mol
Spesifieke Hitte Kapasiteit
0,757 J/g·K
Oorvloed in die aardkors
1,5%
Oorvloed in die heelal
0,0003%
CAS Nommer
7440-09-7
PubChem CID Nommer
5462222
Atomiese Eienskappe
Atoom radius
227 pm
Kovalente Radius
203 pm
Elektronegatiewiteit
0,82 (Pauling scale)
Ionisasie potensiaal
4,3407 eV
Atoom volume
45,46 cm3/mol
Termiese geleidingsvermoë
1,024 W/cm·K
Oksidasiestate
-1, 1
Toepassings
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.
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.
Potassium must be handled with great care with full skin and eye protection
Isotope
Stabiele Isotope
39K, 41KOnstabiele Isotope
32K, 33K, 34K, 35K, 36K, 37K, 38K, 40K, 42K, 43K, 44K, 45K, 46K, 47K, 48K, 49K, 50K, 51K, 52K, 53K, 54K, 55K