Selen

Selen (Se)

chemical element with symbol Se and atomic number 34
Atomic Number34
Atomic Weight78.971
Numri i masës80
Group16
Period4
Blockp
protoni34 p+
neutroni46 n0
elektroni34 e-
Animated Bohr model of Se (Selen)

Tipar Fizik

Atomic Radius
115 pm
molar volume
covalent radius
116 pm
Metallic Radius
117 pm
ionic radius
198 pm
Crystal Radius
184 pm
Van der Waals radius
190 pm
density
4,809 g/cm³
Atomic Radii Of The Elements: Selen020406080100120140160180200pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energjia
proton affinity
electron affinity
2,02067 eV/particle
ionization energy
9,752392 eV/particle
ionization energy of Se (Selen)
enthalpy of vaporization
59,7 kJ/mol
enthalpy of fusion
5,23 kJ/mol
standard enthalpy of formation
227,2 kJ/mol
elektroni
electron shell2, 8, 18, 6
Bohr model: Se (Selen)
valence electron6
Lewis structure: Se (Selen)
konfigurimi i elektronit[Ar] 3d10 4s2 4p4
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
Enhanced Bohr model of Se (Selen)
Orbital Diagram of Se (Selen)
oxidation number-2, -1, 0, 1, 2, 3, 4, 5, 6
Elektronegativiteti
2.55
Electrophilicity Index
2,2408492709619536 eV/particle
fundamental state of matter
gjendja agregate e materiesSolid
gaseous state of matter
Boiling Point
958,15 K
Melting Point
453,15 K
critical pressure
critical temperature
1 766,15 K
triple point
appearance
Ngjyra
Gray
appearanceblack, red, and gray (not pictured) allotropes
refractive index
1,000895
thermodynamic material property
Thermal Conductivity
0,52 W/(m K)
thermal expansion
molar heat capacity
25,363 J/(mol K)
Specific Heat Capacity
0,321 J/(g⋅K)
heat capacity ratio
electrical properties
type
electrical conductivity
electrical resistivity
Superpërcjellshmëria
Magnetizimi
typediamagnetic
magnetic susceptibility (Mass)
-0,000000004 m³/Kg
magnetic susceptibility (Molar)
-0,000000000316 m³/mol
magnetic susceptibility (Volume)
-0,0000193
magnetic ordering
Curie temperature
Néel temperature
strukturë
Crystal StructureSimple Monoclinic (HEX)
lattice constant
4,36 Å
Lattice Anglesπ/2, 1.58493, π/2
mechanical property
hardness
2 MPa
bulk modulus
8,3 GPa
shear modulus
3,7 GPa
Young's modulus
10 GPa
Poisson's ratio
0,33
Shpejtësia e zërit
3 350 m/s
klasifikim
CategoryOther nonmetals, Nonmetals
CAS GroupVIB
IUPAC GroupVIA
Glawe Number95
Mendeleev Number101
Pettifor Number93
Geochemical Classsemi-volatile
Goldschmidt classificationchalcophile

other

Gas Basicity
polarizability
28,9 ± 1 a₀
C6 Dispersion Coefficient
210 a₀
allotropeAmorphous Red Selenium, Amorphous Black Selenium, Monoclinic Selenium, Hexagonal Selenium
Neutron cross section
11,7
Neutron Mass Absorption
0,0056
numër kuantik3P2
space group14 (P121/c1)

Isotopes of Selenium

Stable Isotopes3
Unstable Isotopes30
Natural Isotopes6
Isotopic Composition8049.80%8049.80%7823.69%7823.69%769.23%769.23%828.82%828.82%777.60%777.60%740.86%740.86%

63Se

Numri i masës63
numri i neutroneve29
relative atomic mass
62,981911 ± 0,000537 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
13,2 ± 3,9 ms
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes2016
parity-

decay modeintensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)89%
2p (2-proton emission)0.5%

64Se

Numri i masës64
numri i neutroneve30
relative atomic mass
63,971165 ± 0,000537 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
22,6 ± 0,2 ms
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes2005
parity+

decay modeintensitet
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)

65Se

Numri i masës65
numri i neutroneve31
relative atomic mass
64,964552 ± 0,000322 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
34,2 ± 0,7 ms
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1993
parity-

decay modeintensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)87%

66Se

Numri i masës66
numri i neutroneve32
relative atomic mass
65,955276 ± 0,000215 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
54 ± 4 ms
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1993
parity+

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

67Se

Numri i masës67
numri i neutroneve33
relative atomic mass
66,949994 ± 0,000072 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
133 ± 4 ms
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1991
parity-

decay modeintensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.5%

68Se

Numri i masës68
numri i neutroneve34
relative atomic mass
67,941825236 ± 0,000000532 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
35,5 ± 0,7 s
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1990
parity+

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

69Se

Numri i masës69
numri i neutroneve35
relative atomic mass
68,939414845 ± 0,000001599 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
27,4 ± 0,2 s
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1974
parity-

decay modeintensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.052%

70Se

Numri i masës70
numri i neutroneve36
relative atomic mass
69,933515521 ± 0,0000017 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
41,1 ± 0,3 m
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1950
parity+

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

71Se

Numri i masës71
numri i neutroneve37
relative atomic mass
70,932209431 ± 0,000003 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
4,74 ± 0,05 m
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1957
parity-

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

72Se

Numri i masës72
numri i neutroneve38
relative atomic mass
71,927140506 ± 0,0000021 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
8,4 ± 0,08 d
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1948
parity+

decay modeintensitet
ϵ (electron capture)100%

73Se

Numri i masës73
numri i neutroneve39
relative atomic mass
72,926754881 ± 0,000007969 Da
g-factor
0,19822222222222 ± 0,0028888888888889
natural abundance
Radioaktivitet☢️ radioactive element
half-life
7,15 ± 0,09 h
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1948
parity+

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

74Se

Numri i masës74
numri i neutroneve40
relative atomic mass
73,922475933 ± 0,000000015 Da
g-factor
0
natural abundance
0,86 ± 0,03
Radioaktivitet☢️ radioactive element
half-life
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1922
parity+

decay modeintensitet
+ (double β+ decay)

75Se

Numri i masës75
numri i neutroneve41
relative atomic mass
74,92252287 ± 0,000000078 Da
g-factor
0,2732 ± 0,004
natural abundance
Radioaktivitet☢️ radioactive element
half-life
119,78 ± 0,03 d
Spini5/2
nuclear quadrupole moment
1,1 ± 0,2
koha e zbulimit apo shpikjes1947
parity+

decay modeintensitet
ϵ (electron capture)100%

76Se

Numri i masës76
numri i neutroneve42
relative atomic mass
75,919213702 ± 0,000000017 Da
g-factor
0
natural abundance
9,23 ± 0,07
Radioaktivitetstable isotope
half-lifeNot Radioactive ☢️
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1922
parity+

77Se

Numri i masës77
numri i neutroneve43
relative atomic mass
76,91991415 ± 0,000000067 Da
g-factor
1,06712 ± 0,0001
natural abundance
7,6 ± 0,07
Radioaktivitetstable isotope
half-lifeNot Radioactive ☢️
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1922
parity-

78Se

Numri i masës78
numri i neutroneve44
relative atomic mass
77,917309244 ± 0,000000191 Da
g-factor
0
natural abundance
23,69 ± 0,22
Radioaktivitetstable isotope
half-lifeNot Radioactive ☢️
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1922
parity+

79Se

Numri i masës79
numri i neutroneve45
relative atomic mass
78,918499252 ± 0,000000238 Da
g-factor
-0,29085714285714 ± 0,0042857142857143
natural abundance
Radioaktivitet☢️ radioactive element
half-life
327 ± 28 ky
Spini7/2
nuclear quadrupole moment
0,8 ± 0,2
koha e zbulimit apo shpikjes1950
parity+

decay modeintensitet
β (β decay)100%

80Se

Numri i masës80
numri i neutroneve46
relative atomic mass
79,916521761 ± 0,000001016 Da
g-factor
0
natural abundance
49,8 ± 0,36
Radioaktivitet☢️ radioactive element
half-life
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1922
parity+

decay modeintensitet
(double β decay)

81Se

Numri i masës81
numri i neutroneve47
relative atomic mass
80,917993019 ± 0,000001049 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
18,45 ± 0,12 m
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1948
parity-

decay modeintensitet
β (β decay)100%

82Se

Numri i masës82
numri i neutroneve48
relative atomic mass
81,916699531 ± 0,0000005 Da
g-factor
0
natural abundance
8,82 ± 0,15
Radioaktivitet☢️ radioactive element
half-life
87,6 ± 1,5 Ey
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1922
parity+

decay modeintensitet
(double β decay)100%

83Se

Numri i masës83
numri i neutroneve49
relative atomic mass
82,919118604 ± 0,000003259 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
22,25 ± 0,04 m
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1937
parity+

decay modeintensitet
β (β decay)100%

84Se

Numri i masës84
numri i neutroneve50
relative atomic mass
83,918466761 ± 0,000002105 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
3,26 ± 0,1 m
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1960
parity+

decay modeintensitet
β (β decay)100%

85Se

Numri i masës85
numri i neutroneve51
relative atomic mass
84,922260758 ± 0,000002804 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
32,9 ± 0,3 s
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1960
parity

decay modeintensitet
β (β decay)100%

86Se

Numri i masës86
numri i neutroneve52
relative atomic mass
85,924311732 ± 0,000002705 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
14,3 ± 0,3 s
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1973
parity+

decay modeintensitet
β (β decay)100%
β n (β-delayed neutron emission)

87Se

Numri i masës87
numri i neutroneve53
relative atomic mass
86,928688616 ± 0,000002405 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
5,5 ± 0,06 s
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1968
parity+

decay modeintensitet
β (β decay)100%
β n (β-delayed neutron emission)0.6%

88Se

Numri i masës88
numri i neutroneve54
relative atomic mass
87,93141749 ± 0,000003604 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,53 ± 0,06 s
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1970
parity+

decay modeintensitet
β (β decay)100%
β n (β-delayed neutron emission)0.99%

89Se

Numri i masës89
numri i neutroneve55
relative atomic mass
88,936669058 ± 0,000004003 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
430 ± 50 ms
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1971
parity+

decay modeintensitet
β (β decay)100%
β n (β-delayed neutron emission)7.8%

90Se

Numri i masës90
numri i neutroneve56
relative atomic mass
89,940096 ± 0,000354 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
210 ± 80 ms
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1994
parity+

decay modeintensitet
β (β decay)100%
β n (β-delayed neutron emission)

91Se

Numri i masës91
numri i neutroneve57
relative atomic mass
90,9457 ± 0,000465 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
270 ± 50 ms
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1975
parity+

decay modeintensitet
β (β decay)100%
β n (β-delayed neutron emission)21%
2n (2-neutron emission)

92Se

Numri i masës92
numri i neutroneve58
relative atomic mass
91,94984 ± 0,000429 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1997
parity+

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

93Se

Numri i masës93
numri i neutroneve59
relative atomic mass
92,956135 ± 0,000429 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1997
parity+

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

94Se

Numri i masës94
numri i neutroneve60
relative atomic mass
93,96049 ± 0,000537 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1997
parity+

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

95Se

Numri i masës95
numri i neutroneve61
relative atomic mass
94,9673 ± 0,000537 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes2010
parity+

decay modeintensitet
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Selen 1

historia

zbuluesJöns Berzelius
vendndodhja e zbulimitSweden
koha e zbulimit apo shpikjes1818
EtimologjiaGreek: selênê (moon).
pronunciationsi-LEE-ni-em (anglisht)

burim

Abundance
Abundance in Earth's crust
0,05 mg/kg
natural abundance (Oqeani)
0,0002 mg/L
natural abundance (Trupi i njeriut)
0,000005 %
natural abundance (meteoroid)
0,0013 %
natural abundance (Diell)
Abundance in Universe
0,000003 %

Nuclear Screening Constants

1s0.7378
2p3.9348
2s9.1116
3d15.523
3p15.295
3s14.5966
4p25.7128
4s24.2424