Potassi

Potassi (K)

chemical element with symbol K and atomic number 19
Atomic Number19
Atomic Weight39.0983
Rhif màs39
Group1
Period4
Blocks
Proton19 p+
Niwtron20 n0
Electron19 e-
Animated Bohr model of K (Potassi)

Nodwedd Ffisegol

Atomic Radius
220 pm
molar volume
covalent radius
196 pm
Metallic Radius
203 pm
ionic radius
137 pm
Crystal Radius
151 pm
Van der Waals radius
275 pm
density
0.89 g/cm³
Atomic Radii Of The Elements: Potassi020406080100120140160180200220240260280pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
0.50147 eV/particle
ionization energy
4.34066354 eV/particle
ionization energy of K (Potassi)
enthalpy of vaporization
2.33 kJ/mol
enthalpy of fusion
102.5 kJ/mol
standard enthalpy of formation
Electron
plisgyn yr electron2, 8, 8, 1
Bohr model: K (Potassi)
valence electron1
Lewis structure: K (Potassi)
trefn yr electronnau[Ar] 4s1
1s2 2s2 2p6 3s2 3p6 4s1
Enhanced Bohr model of K (Potassi)
Orbital Diagram of K (Potassi)
Cyflwr ocsidiad-1, 1
Electronegatifedd
0.82
Electrophilicity Index
0.7633848415985606 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
1,032.15 K
Melting Point
336.65 K
critical pressure
16 MPa
critical temperature
2,223.15 K
triple point
appearance
lliw
Silver
appearancesilvery gray
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
0.757 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
14 MS/m
Gwrthedd
0.00000007000000000002 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.0000000067 m³/Kg
magnetic susceptibility (Molar)
0.000000000262 m³/mol
magnetic susceptibility (Volume)
0.00000574
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureBody Centered Cubic (BCC)
lattice constant
5.23 Å
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
0.4 MPa
bulk modulus
3.1 GPa
shear modulus
1.3 GPa
Young's modulus
Poisson's ratio
speed of sound
2,000 m/s
classification
CategoryAlkali metals, Alkali metals
CAS GroupIA
IUPAC GroupIA
Glawe Number10
Mendeleev Number3
Pettifor Number10
Geochemical Classalkali metal
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
289.7 ± 0.3 a₀
C6 Dispersion Coefficient
3,923 a₀
allotrope
Neutron cross section
2.1
Neutron Mass Absorption
0.0018
quantum number2S1/2
space group229 (Im_3m)

Isotopes of Potassium

Stable Isotopes2
Unstable Isotopes27
Natural Isotopes3
Isotopic Composition3993.26%3993.26%416.73%416.73%400.01%400.01%

31K

Rhif màs31
neutron number12
relative atomic mass
31.03678 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod2019
parity+

decay modeintensity
3p100%

32K

Rhif màs32
neutron number13
relative atomic mass
32.023607 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
p (proton emission)

33K

Rhif màs33
neutron number14
relative atomic mass
33.008095 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
p (proton emission)

34K

Rhif màs34
neutron number15
relative atomic mass
33.99869 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
p (proton emission)

35K

Rhif màs35
neutron number16
relative atomic mass
34.988005406 ± 0.00000055 Da
g-factor
0.26133333333333 ± 0.0046666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
175.2 ± 1.9 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1976
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.37%

36K

Rhif màs36
neutron number17
relative atomic mass
35.981301887 ± 0.000000349 Da
g-factor
0.274 ± 0.0005
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
341 ± 3 ms
spin2
nuclear quadrupole moment
dyddiad darganfod1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.048%
β+α (β+-delayed α emission)0.0034%

37K

Rhif màs37
neutron number18
relative atomic mass
36.97337589 ± 0.0000001 Da
g-factor
0.13547333333333 ± 0.00004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.23651 ± 0.00094 s
spin3/2
nuclear quadrupole moment
0.109 ± 0.004
dyddiad darganfod1958
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

38K

Rhif màs38
neutron number19
relative atomic mass
37.969081114 ± 0.000000209 Da
g-factor
0.457 ± 0.002
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7.651 ± 0.019 m
spin3
nuclear quadrupole moment
dyddiad darganfod1937
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

39K

Rhif màs39
neutron number20
relative atomic mass
38.96370648482 ± 0.00000000489 Da
g-factor
0.26098 ± 0.0000053333333333333
natural abundance
93.2581 ± 0.0044
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.0603 ± 0.0006
dyddiad darganfod1921
parity+

40K

Rhif màs40
neutron number21
relative atomic mass
39.963998165 ± 0.00000006 Da
g-factor
natural abundance
0.0117 ± 0.0001
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.248 ± 0.003 Gy
spin4
nuclear quadrupole moment
-0.075 ± 0.0008
dyddiad darganfod1935
parity-

decay modeintensity
β (β decay)89.28%
β+ (β+ decay; β+ = ϵ + e+)10.72%

41K

Rhif màs41
neutron number22
relative atomic mass
40.96182525611 ± 0.00000000403 Da
g-factor
0.143248 ± 0.0000033333333333333
natural abundance
6.7302 ± 0.0044
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.0734 ± 0.0007
dyddiad darganfod1921
parity+

42K

Rhif màs42
neutron number23
relative atomic mass
41.962402305 ± 0.000000113 Da
g-factor
-0.57125 ± 0.0003
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
12.355 ± 0.007 h
spin2
nuclear quadrupole moment
dyddiad darganfod1935
parity-

decay modeintensity
β (β decay)100%

43K

Rhif màs43
neutron number24
relative atomic mass
42.960734701 ± 0.00000044 Da
g-factor
0.10886666666667 ± 0.00053333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
22.3 ± 0.1 h
spin3/2
nuclear quadrupole moment
dyddiad darganfod1949
parity+

decay modeintensity
β (β decay)100%

44K

Rhif màs44
neutron number25
relative atomic mass
43.961586984 ± 0.00000045 Da
g-factor
-0.428 ± 0.002
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
22.13 ± 0.19 m
spin2
nuclear quadrupole moment
dyddiad darganfod1954
parity-

decay modeintensity
β (β decay)100%

45K

Rhif màs45
neutron number26
relative atomic mass
44.960691491 ± 0.00000056 Da
g-factor
0.1156 ± 0.00053333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.8 ± 0.6 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1964
parity+

decay modeintensity
β (β decay)100%

46K

Rhif màs46
neutron number27
relative atomic mass
45.961981584 ± 0.00000078 Da
g-factor
-0.5255 ± 0.003
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
96.3 ± 0.08 s
spin2
nuclear quadrupole moment
dyddiad darganfod1965
parity-

decay modeintensity
β (β decay)100%

47K

Rhif màs47
neutron number28
relative atomic mass
46.961661612 ± 0.0000015 Da
g-factor
3.866 ± 0.018
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.38 ± 0.03 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1964
parity+

decay modeintensity
β (β decay)100%

48K

Rhif màs48
neutron number29
relative atomic mass
47.965341184 ± 0.00000083 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.83 ± 0.14 s
spin1
nuclear quadrupole moment
dyddiad darganfod1972
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1.14%

49K

Rhif màs49
neutron number30
relative atomic mass
48.968210753 ± 0.00000086 Da
g-factor
2.6772 ± 0.0016
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.26 ± 0.05 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1972
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)86%

50K

Rhif màs50
neutron number31
relative atomic mass
49.972380015 ± 0.0000083 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
472 ± 4 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1972
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)28.6%
2n (2-neutron emission)

51K

Rhif màs51
neutron number32
relative atomic mass
50.975828664 ± 0.000014 Da
g-factor
0.342 ± 0.0013333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
365 ± 5 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1983
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)65%
2n (2-neutron emission)

52K

Rhif màs52
neutron number33
relative atomic mass
51.981602 ± 0.000036 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
110 ± 4 ms
spin2
nuclear quadrupole moment
dyddiad darganfod1983
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)72.2%
2n (2-neutron emission)2.3%

53K

Rhif màs53
neutron number34
relative atomic mass
52.9868 ± 0.00012 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
30 ± 5 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1983
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)64%
2n (2-neutron emission)10%

54K

Rhif màs54
neutron number35
relative atomic mass
53.994471 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
10 ± 5 ms
spin2
nuclear quadrupole moment
dyddiad darganfod1983
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

55K

Rhif màs55
neutron number36
relative atomic mass
55.000505 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod2009
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

56K

Rhif màs56
neutron number37
relative atomic mass
56.008567 ± 0.000644 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin2
nuclear quadrupole moment
dyddiad darganfod2009
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

57K

Rhif màs57
neutron number38
relative atomic mass
57.015169 ± 0.000644 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

58K

Rhif màs58
neutron number39
relative atomic mass
58.023543 ± 0.000751 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin2
nuclear quadrupole moment
dyddiad darganfod2019
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

59K

Rhif màs59
neutron number40
relative atomic mass
59.030864 ± 0.000859 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Kalium

hanes

darganfyddwr neu ddyfeisiwrSir Humphrey Davy
man darganfodEngland
dyddiad darganfod1807
geirdarddiadEnglish: pot ash; symbol from Latin: kalium, (alkali).
ynganiadpe-TASS-i-em (Saesneg)

source

Abundance
Abundance in Earth's crust
20,900 mg/kg
natural abundance (cefnfor)
399 mg/L
natural abundance (corff dynol)
0.2 %
natural abundance (Awyrfaen)
0.07 %
natural abundance (Haul)
0.0004 %
Abundance in Universe
0.0003 %

Nuclear Screening Constants

1s0.5105
2p3.9728
2s5.9938
3p11.2744
3s10.3201
4s15.5048