Potassi

Potassi (K)

chemical element with symbol K and atomic number 19
Atomic Number19
Atomic Weight39.0983
mass number39
Group1
Period4
Blocks
proton19 p+
neutron20 n0
electron19 e-
Animated Bohr model of K (Potassi)

Proprietat Fisica

Rai Atomic
220 pm
molar volume
covalent radius
196 pm
Metallic Radius
203 pm
ionic radius
137 pm
Crystal Radius
151 pm
Rai de van der Waals
275 pm
densitat
0.89 g/cm³
Atomic Radii Of The Elements: Potassi0102030405060708090100110120130140150160170180190200210220230240250260270280pmRai AtomicCovalent RadiusMetallic RadiusRai de van der Waals

Chemical Property

energia
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
electron shell2, 8, 8, 1
Bohr model: K (Potassi)
valence electron1
Lewis structure: K (Potassi)
electron configuration[Ar] 4s1
1s2 2s2 2p6 3s2 3p6 4s1
Enhanced Bohr model of K (Potassi)
Orbital Diagram of K (Potassi)
oxidation number-1, 1
Electronegativitat
0.82
Electrophilicity Index
0.7633848415985606 eV/particle
fundamental state of matter
estat de la matèriaSolid
gaseous state of matter
Boiling Point
1032.15 K
Melting Point
336.65 K
critical pressure
16 MPa
critical temperature
2223.15 K
Ponch triple
appearance
Color
Silver
appearancesilvery gray
Indici de refraccion
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
0.757 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
14 MS/m
electrical resistivity
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
estructura
Crystal StructureBody Centered Cubic (BCC)
lattice constant
5.23 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Duretat
0.4 MPa
bulk modulus
3.1 GPa
shear modulus
1.3 GPa
Young's modulus
Poisson's ratio
speed of sound
2000 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
3923 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

mass number31
neutron number12
relative atomic mass
31.03678 ± 0.000322 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin3/2
nuclear quadrupole moment
data de descobèrta2019
parity+

decay modeintensity
3p100%

32K

mass number32
neutron number13
relative atomic mass
32.023607 ± 0.000429 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin1
nuclear quadrupole moment
data de descobèrta
parity+

decay modeintensity
p (proton emission)

33K

mass number33
neutron number14
relative atomic mass
33.008095 ± 0.000215 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin3/2
nuclear quadrupole moment
data de descobèrta
parity+

decay modeintensity
p (proton emission)

34K

mass number34
neutron number15
relative atomic mass
33.99869 ± 0.00021 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin1
nuclear quadrupole moment
data de descobèrta
parity+

decay modeintensity
p (proton emission)

35K

mass number35
neutron number16
relative atomic mass
34.988005406 ± 0.00000055 Da
g-factor
0.26133333333333 ± 0.0046666666666667
natural abundance
Radioactivitat☢️ radioactive element
Semivida
175.2 ± 1.9 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1976
parity+

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

36K

mass number36
neutron number17
relative atomic mass
35.981301887 ± 0.000000349 Da
g-factor
0.274 ± 0.0005
natural abundance
Radioactivitat☢️ radioactive element
Semivida
341 ± 3 ms
Espin2
nuclear quadrupole moment
data de descobèrta1967
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

mass number37
neutron number18
relative atomic mass
36.97337589 ± 0.0000001 Da
g-factor
0.13547333333333 ± 0.00004
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.23651 ± 0.00094 s
Espin3/2
nuclear quadrupole moment
0.109 ± 0.004
data de descobèrta1958
parity+

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

38K

mass number38
neutron number19
relative atomic mass
37.969081114 ± 0.000000209 Da
g-factor
0.457 ± 0.002
natural abundance
Radioactivitat☢️ radioactive element
Semivida
7.651 ± 0.019 m
Espin3
nuclear quadrupole moment
data de descobèrta1937
parity+

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

39K

mass number39
neutron number20
relative atomic mass
38.96370648482 ± 0.00000000489 Da
g-factor
0.26098 ± 0.0000053333333333333
natural abundance
93.2581 ± 0.0044
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin3/2
nuclear quadrupole moment
0.0603 ± 0.0006
data de descobèrta1921
parity+

40K

mass number40
neutron number21
relative atomic mass
39.963998165 ± 0.00000006 Da
g-factor
natural abundance
0.0117 ± 0.0001
Radioactivitat☢️ radioactive element
Semivida
1.248 ± 0.003 Gy
Espin4
nuclear quadrupole moment
-0.075 ± 0.0008
data de descobèrta1935
parity-

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

41K

mass number41
neutron number22
relative atomic mass
40.96182525611 ± 0.00000000403 Da
g-factor
0.143248 ± 0.0000033333333333333
natural abundance
6.7302 ± 0.0044
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin3/2
nuclear quadrupole moment
0.0734 ± 0.0007
data de descobèrta1921
parity+

42K

mass number42
neutron number23
relative atomic mass
41.962402305 ± 0.000000113 Da
g-factor
-0.57125 ± 0.0003
natural abundance
Radioactivitat☢️ radioactive element
Semivida
12.355 ± 0.007 h
Espin2
nuclear quadrupole moment
data de descobèrta1935
parity-

decay modeintensity
β (β decay)100%

43K

mass number43
neutron number24
relative atomic mass
42.960734701 ± 0.00000044 Da
g-factor
0.10886666666667 ± 0.00053333333333333
natural abundance
Radioactivitat☢️ radioactive element
Semivida
22.3 ± 0.1 h
Espin3/2
nuclear quadrupole moment
data de descobèrta1949
parity+

decay modeintensity
β (β decay)100%

44K

mass number44
neutron number25
relative atomic mass
43.961586984 ± 0.00000045 Da
g-factor
-0.428 ± 0.002
natural abundance
Radioactivitat☢️ radioactive element
Semivida
22.13 ± 0.19 m
Espin2
nuclear quadrupole moment
data de descobèrta1954
parity-

decay modeintensity
β (β decay)100%

45K

mass number45
neutron number26
relative atomic mass
44.960691491 ± 0.00000056 Da
g-factor
0.1156 ± 0.00053333333333333
natural abundance
Radioactivitat☢️ radioactive element
Semivida
17.8 ± 0.6 m
Espin3/2
nuclear quadrupole moment
data de descobèrta1964
parity+

decay modeintensity
β (β decay)100%

46K

mass number46
neutron number27
relative atomic mass
45.961981584 ± 0.00000078 Da
g-factor
-0.5255 ± 0.003
natural abundance
Radioactivitat☢️ radioactive element
Semivida
96.3 ± 0.08 s
Espin2
nuclear quadrupole moment
data de descobèrta1965
parity-

decay modeintensity
β (β decay)100%

47K

mass number47
neutron number28
relative atomic mass
46.961661612 ± 0.0000015 Da
g-factor
3.866 ± 0.018
natural abundance
Radioactivitat☢️ radioactive element
Semivida
17.38 ± 0.03 s
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1964
parity+

decay modeintensity
β (β decay)100%

48K

mass number48
neutron number29
relative atomic mass
47.965341184 ± 0.00000083 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
6.83 ± 0.14 s
Espin1
nuclear quadrupole moment
data de descobèrta1972
parity-

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

49K

mass number49
neutron number30
relative atomic mass
48.968210753 ± 0.00000086 Da
g-factor
2.6772 ± 0.0016
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.26 ± 0.05 s
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1972
parity+

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

50K

mass number50
neutron number31
relative atomic mass
49.972380015 ± 0.0000083 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
472 ± 4 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1972
parity-

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

51K

mass number51
neutron number32
relative atomic mass
50.975828664 ± 0.000014 Da
g-factor
0.342 ± 0.0013333333333333
natural abundance
Radioactivitat☢️ radioactive element
Semivida
365 ± 5 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1983
parity+

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

52K

mass number52
neutron number33
relative atomic mass
51.981602 ± 0.000036 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
110 ± 4 ms
Espin2
nuclear quadrupole moment
data de descobèrta1983
parity-

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

53K

mass number53
neutron number34
relative atomic mass
52.9868 ± 0.00012 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
30 ± 5 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1983
parity+

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

54K

mass number54
neutron number35
relative atomic mass
53.994471 ± 0.000429 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
10 ± 5 ms
Espin2
nuclear quadrupole moment
data de descobèrta1983
parity-

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

55K

mass number55
neutron number36
relative atomic mass
55.000505 ± 0.000537 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin3/2
nuclear quadrupole moment
data de descobèrta2009
parity+

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

56K

mass number56
neutron number37
relative atomic mass
56.008567 ± 0.000644 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin2
nuclear quadrupole moment
data de descobèrta2009
parity-

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

57K

mass number57
neutron number38
relative atomic mass
57.015169 ± 0.000644 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin3/2
nuclear quadrupole moment
data de descobèrta2018
parity+

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

58K

mass number58
neutron number39
relative atomic mass
58.023543 ± 0.000751 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin2
nuclear quadrupole moment
data de descobèrta2019
parity-

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

59K

mass number59
neutron number40
relative atomic mass
59.030864 ± 0.000859 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin3/2
nuclear quadrupole moment
data de descobèrta2018
parity+

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

istòria

descobridor o inventaireSir Humphrey Davy
luòc de descobèrtaEngland
data de descobèrta1807
EtimologiaEnglish: pot ash; symbol from Latin: kalium, (alkali).
pronunciationpe-TASS-i-em (English)

source

Abundance
Abundance in Earth's crust
20900 mg/kg
natural abundance (Ocean)
399 mg/L
natural abundance (còs uman)
0.2 %
natural abundance (meteoroid)
0.07 %
natural abundance (Solelh)
0.0004 %
Abundance in Universe
0.0003 %

Nuclear Screening Constants

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