Selen

Selen (Se)

chemical element with symbol Se and atomic number 34
Atomic Number34
Atomic Weight78.971
mass number80
Group16
Period4
Blockp
Proton34 p+
Neytron46 n0
Elektron34 e-
Animated Bohr model of Se (Selen)

Fizik Xossa

Atom Radiusi
115 pm
Molyar hajm
Kovalentlik Radiusi
116 pm
Metallic Radius
117 pm
Ion radiuslar
198 pm
Crystal Radius
184 pm
Van der Waals radius
190 pm
density
4,809 g/cm³
Atomic Radii Of The Elements: Selen0102030405060708090100110120130140150160170180190pmAtom RadiusiKovalentlik RadiusiMetallic RadiusVan der Waals radius

Chemical Property

energiya
proton affinity
electron affinity
2,02067 eV/particle
ionization energy
9,752392 eV/particle
ionization energy of Se (Selen)
Solishtirma qaynash issiqligi
59,7 kJ/mol
solishtirma erish issiqligi
5,23 kJ/mol
standard enthalpy of formation
227,2 kJ/mol
Elektron
Ion asboblar2, 8, 18, 6
Bohr model: Se (Selen)
valence electron6
Lewis structure: Se (Selen)
electron configuration[Ar] 3d10 4s2 4p4
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
Enhanced Bohr model of Se (Selen)
Orbital Diagram of Se (Selen)
Oksidlanish darajasi-2, -1, 0, 1, 2, 3, 4, 5, 6
Elektrmanfiylik
2.55
Electrophilicity Index
2,2408492709619536 eV/particle
fundamental state of matter
phase of matterSolid
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
Rang
Gray
appearanceblack, red, and gray (not pictured) allotropes
refractive index
1,000895
thermodynamic material property
Thermal Conductivity
0,52 W/(m K)
Issiqlikdan kengayish
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
superconductivity
Magnetizm
typediamagnetic
magnetic susceptibility (Mass)
-0,000000004 m³/Kg
magnetic susceptibility (Molar)
-0,000000000316 m³/mol
magnetic susceptibility (Volume)
-0,0000193
magnetic ordering
Kyuri nuqtasi
Néel temperature
Tuzilma
Crystal StructureSimple Monoclinic (HEX)
Kristall panjara davri
4,36 Å
Lattice Anglesπ/2, 1.58493, π/2
mechanical property
Qattiqlik
2 MPa
bulk modulus
8,3 GPa
shear modulus
3,7 GPa
Yung moduli
10 GPa
Poisson's ratio
0,33
Tovush tezligi
3 350 m/s
klassifikatsiya
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
Atom kvant sonlari3P2
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

mass number63
neutron number29
Nisbiy atom massa
62,981911 ± 0,000537 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
13,2 ± 3,9 ms
spin3/2
nuclear quadrupole moment
time of discovery or invention2016
parity-

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

64Se

mass number64
neutron number30
Nisbiy atom massa
63,971165 ± 0,000537 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
22,6 ± 0,2 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention2005
parity+

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

65Se

mass number65
neutron number31
Nisbiy atom massa
64,964552 ± 0,000322 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
34,2 ± 0,7 ms
spin3/2
nuclear quadrupole moment
time of discovery or invention1993
parity-

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

66Se

mass number66
neutron number32
Nisbiy atom massa
65,955276 ± 0,000215 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
54 ± 4 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1993
parity+

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

67Se

mass number67
neutron number33
Nisbiy atom massa
66,949994 ± 0,000072 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
133 ± 4 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention1991
parity-

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

68Se

mass number68
neutron number34
Nisbiy atom massa
67,941825236 ± 0,000000532 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
35,5 ± 0,7 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1990
parity+

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

69Se

mass number69
neutron number35
Nisbiy atom massa
68,939414845 ± 0,000001599 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
27,4 ± 0,2 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1974
parity-

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

70Se

mass number70
neutron number36
Nisbiy atom massa
69,933515521 ± 0,0000017 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
41,1 ± 0,3 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1950
parity+

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

71Se

mass number71
neutron number37
Nisbiy atom massa
70,932209431 ± 0,000003 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
4,74 ± 0,05 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1957
parity-

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

72Se

mass number72
neutron number38
Nisbiy atom massa
71,927140506 ± 0,0000021 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
8,4 ± 0,08 d
spin0
nuclear quadrupole moment
0
time of discovery or invention1948
parity+

decay modeintensity
ϵ (electron capture)100%

73Se

mass number73
neutron number39
Nisbiy atom massa
72,926754881 ± 0,000007969 Da
g-factor
0,19822222222222 ± 0,0028888888888889
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
7,15 ± 0,09 h
spin9/2
nuclear quadrupole moment
time of discovery or invention1948
parity+

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

74Se

mass number74
neutron number40
Nisbiy atom massa
73,922475933 ± 0,000000015 Da
g-factor
0
natural abundance
0,86 ± 0,03
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

decay modeintensity
+ (double β+ decay)

75Se

mass number75
neutron number41
Nisbiy atom massa
74,92252287 ± 0,000000078 Da
g-factor
0,2732 ± 0,004
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
119,78 ± 0,03 d
spin5/2
nuclear quadrupole moment
1,1 ± 0,2
time of discovery or invention1947
parity+

decay modeintensity
ϵ (electron capture)100%

76Se

mass number76
neutron number42
Nisbiy atom massa
75,919213702 ± 0,000000017 Da
g-factor
0
natural abundance
9,23 ± 0,07
Radioaktivlikstable isotope
Yarim yemirilish davriNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

77Se

mass number77
neutron number43
Nisbiy atom massa
76,91991415 ± 0,000000067 Da
g-factor
1,06712 ± 0,0001
natural abundance
7,6 ± 0,07
Radioaktivlikstable isotope
Yarim yemirilish davriNot Radioactive ☢️
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1922
parity-

78Se

mass number78
neutron number44
Nisbiy atom massa
77,917309244 ± 0,000000191 Da
g-factor
0
natural abundance
23,69 ± 0,22
Radioaktivlikstable isotope
Yarim yemirilish davriNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

79Se

mass number79
neutron number45
Nisbiy atom massa
78,918499252 ± 0,000000238 Da
g-factor
-0,29085714285714 ± 0,0042857142857143
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
327 ± 28 ky
spin7/2
nuclear quadrupole moment
0,8 ± 0,2
time of discovery or invention1950
parity+

decay modeintensity
β (β decay)100%

80Se

mass number80
neutron number46
Nisbiy atom massa
79,916521761 ± 0,000001016 Da
g-factor
0
natural abundance
49,8 ± 0,36
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

decay modeintensity
(double β decay)

81Se

mass number81
neutron number47
Nisbiy atom massa
80,917993019 ± 0,000001049 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
18,45 ± 0,12 m
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1948
parity-

decay modeintensity
β (β decay)100%

82Se

mass number82
neutron number48
Nisbiy atom massa
81,916699531 ± 0,0000005 Da
g-factor
0
natural abundance
8,82 ± 0,15
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
87,6 ± 1,5 Ey
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

decay modeintensity
(double β decay)100%

83Se

mass number83
neutron number49
Nisbiy atom massa
82,919118604 ± 0,000003259 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
22,25 ± 0,04 m
spin9/2
nuclear quadrupole moment
time of discovery or invention1937
parity+

decay modeintensity
β (β decay)100%

84Se

mass number84
neutron number50
Nisbiy atom massa
83,918466761 ± 0,000002105 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
3,26 ± 0,1 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1960
parity+

decay modeintensity
β (β decay)100%

85Se

mass number85
neutron number51
Nisbiy atom massa
84,922260758 ± 0,000002804 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
32,9 ± 0,3 s
spin5/2
nuclear quadrupole moment
time of discovery or invention1960
parity

decay modeintensity
β (β decay)100%

86Se

mass number86
neutron number52
Nisbiy atom massa
85,924311732 ± 0,000002705 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
14,3 ± 0,3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1973
parity+

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

87Se

mass number87
neutron number53
Nisbiy atom massa
86,928688616 ± 0,000002405 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
5,5 ± 0,06 s
spin3/2
nuclear quadrupole moment
time of discovery or invention1968
parity+

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

88Se

mass number88
neutron number54
Nisbiy atom massa
87,93141749 ± 0,000003604 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
1,53 ± 0,06 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1970
parity+

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

89Se

mass number89
neutron number55
Nisbiy atom massa
88,936669058 ± 0,000004003 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
430 ± 50 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention1971
parity+

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

90Se

mass number90
neutron number56
Nisbiy atom massa
89,940096 ± 0,000354 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
210 ± 80 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1994
parity+

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

91Se

mass number91
neutron number57
Nisbiy atom massa
90,9457 ± 0,000465 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
270 ± 50 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1975
parity+

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

92Se

mass number92
neutron number58
Nisbiy atom massa
91,94984 ± 0,000429 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
spin0
nuclear quadrupole moment
0
time of discovery or invention1997
parity+

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

93Se

mass number93
neutron number59
Nisbiy atom massa
92,956135 ± 0,000429 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1997
parity+

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

94Se

mass number94
neutron number60
Nisbiy atom massa
93,96049 ± 0,000537 Da
g-factor
0
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
spin0
nuclear quadrupole moment
0
time of discovery or invention1997
parity+

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

95Se

mass number95
neutron number61
Nisbiy atom massa
94,9673 ± 0,000537 Da
g-factor
natural abundance
Radioaktivlik☢️ Radioaktiv elementlar
Yarim yemirilish davri
spin3/2
nuclear quadrupole moment
time of discovery or invention2010
parity+

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

tarix

discoverer or inventorJöns Berzelius
location of discoverySweden
time of discovery or invention1818
EtimologiyaGreek: selênê (moon).
pronunciationsi-LEE-ni-em (inglizcha)

source

Abundance
Abundance in Earth's crust
0,05 mg/kg
natural abundance (Okean)
0,0002 mg/L
natural abundance (Inson tanasi)
0,000005 %
natural abundance (Meteoroid)
0,0013 %
natural abundance (Quyosh)
Abundance in Universe
0,000003 %

Nuclear Screening Constants

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