Selen (Se)

grundstof med atomnummer 34

Atomnummer	34
Atommasse	78.971
mass number	80

Gruppe	16
Periode	4
Blok	p

proton	34 p⁺
neutron	46 n⁰
elektron	34 e^-

Fysisk Egenskab

Atomradius	115 pm 224 pm
molar volume	16,5 cm³/mol
Kovalent Radius	116 pm 107 pm 107 pm 117 pm 120 pm
Metallic Radius	117 pm 140 pm
Ionisk radius	198 pm 50 pm 28 pm 42 pm
Crystal Radius	184 pm 64 pm 42 pm 56 pm
Van der Waals-radius	190 pm 190 pm 403 pm 190 pm 229 pm 420,5 pm
massefylde	4,809 g/cm³ 3.990 kg/m³

Kemisk Egenskab

energi

proton affinity
electron affinity	2,02067 eV/particle
ioniseringsenergi	9,752392 eV/particle 21,196 eV/particle 31,697 eV/particle 42,947 eV/particle 68,3 eV/particle 81,827 eV/particle 155,33 eV/particle 184 eV/particle 219 eV/particle 255 eV/particle 291 eV/particle 342,9 eV/particle 383 eV/particle 426 eV/particle 473 eV/particle 517 eV/particle 650,5 eV/particle 693,38 eV/particle 739,8 eV/particle 798 eV/particle 845,8 eV/particle 887 eV/particle 989,6 eV/particle 1.036,362 eV/particle 2.540,7 eV/particle 2.674 eV/particle 2.820 eV/particle 2.964 eV/particle 3.146 eV/particle 3.301,8 eV/particle 3.507 eV/particle 3.636,526 eV/particle 15.367,4907 eV/particle 15.968,083 eV/particle

Fordampningsvarme	59,7 kJ/mol
smeltevarme	5,23 kJ/mol
standard enthalpy of formation	227,2 kJ/mol
elektron

Elektronskal	2, 8, 18, 6

Valenselektron	6 ⓘ

electron configuration	[Ar] 3d¹⁰ 4s² 4p⁴ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁴

Oxidationstrin	-2, -1, 0, 1, 2, 3, 4, 5, 6
Elektronegativitet	14,34 eV/particle 0.2240328 2.55
Electrophilicity Index	2,2408492709619536 eV/particle
fundamental state of matter

stoffase	Fast stof
gaseous state of matter
Kogepunkt	958,15 K 958,15 K
Smeltepunkt	453,15 K 493,95 K
critical pressure	27,2 MPa
critical temperature	1.766,15 K 1.766,15 K
trippelpunkt
appearance
farve	Grå #ff1493 #ffa100 #ffa100
appearance	black, red, and gray (not pictured) allotropes
Brydningsindeks	1,000895
materialeegenskab
Varmeledningsevne	0,52 W/(m K)
Termisk ekspansion
molar heat capacity	25,363 J/(mol K)
Varmefylde	0,321 J/(g⋅K)
Adiabateksponenten
electrical properties
type
specifik ledningsevne
Elektrisk resistivitet
superledning
Magnetisme
type	diamagnetic
magnetic susceptibility (Mass)	-0,000000004 m³/Kg
magnetic susceptibility (Molar)	-0,000000000316 m³/mol
magnetic susceptibility (Volume)	-0,0000193
magnetic ordering
Curietemperaturen
Néel temperature
struktur
Krystalstruktur	Simpel Monoklin (HEX)
lattice constant	4,36 Å
Lattice Angles	π/2, 1.58493, π/2
mechanical property
hårdhed	736 MPa 2 MPa
Kompressibilitetsmodul	8,3 GPa
Forskydningsmodul	3,7 GPa
E-modul	10 GPa
Poissons forhold	0,33
speed of sound	3.350 m/s
klassificering
Kategori	Andre ikke-metaller, Nonmetals
CAS Group	VIB
IUPAC Group	VIA
Glawe Number	95
Mendeleev Number	101
Pettifor Number	93
Geochemical Class	semi-volatile
Goldschmidt classification	chalcophile

øvrige

Gas Basicity
polarizability	28,9 ± 1 a₀
C6 Dispersion Coefficient	210 a₀ 233 a₀
allotrope	Amorphous Red Selenium, Amorphous Black Selenium, Monoclinic Selenium, Hexagonal Selenium
Neutron cross section	11,7
Neutron Mass Absorption	0,0056
quantum number	3P2
rumgruppe	14 (P121/c1)

Isotopes of Selenium

Stable Isotopes	3
Unstable Isotopes	30
Natural Isotopes	6

⁶³Se

mass number	63
neutron number	29
Relative Atomic Mass	62,981911 ± 0,000537 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	13,2 ± 3,9 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	2016
Paritet	-

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

⁶⁴Se

mass number	64
neutron number	30
Relative Atomic Mass	63,971165 ± 0,000537 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	22,6 ± 0,2 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	2005
Paritet	+

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

⁶⁵Se

mass number	65
neutron number	31
Relative Atomic Mass	64,964552 ± 0,000322 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	34,2 ± 0,7 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1993
Paritet	-

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

⁶⁶Se

mass number	66
neutron number	32
Relative Atomic Mass	65,955276 ± 0,000215 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	54 ± 4 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1993
Paritet	+

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

⁶⁷Se

mass number	67
neutron number	33
Relative Atomic Mass	66,949994 ± 0,000072 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	133 ± 4 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1991
Paritet	-

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

⁶⁸Se

mass number	68
neutron number	34
Relative Atomic Mass	67,941825236 ± 0,000000532 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	35,5 ± 0,7 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1990
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁶⁹Se

mass number	69
neutron number	35
Relative Atomic Mass	68,939414845 ± 0,000001599 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	27,4 ± 0,2 s
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1974
Paritet	-

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

⁷⁰Se

mass number	70
neutron number	36
Relative Atomic Mass	69,933515521 ± 0,0000017 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	41,1 ± 0,3 m
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1950
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁷¹Se

mass number	71
neutron number	37
Relative Atomic Mass	70,932209431 ± 0,000003 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	4,74 ± 0,05 m
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1957
Paritet	-

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁷²Se

mass number	72
neutron number	38
Relative Atomic Mass	71,927140506 ± 0,0000021 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	8,4 ± 0,08 d
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1948
Paritet	+

decay mode	Intensitet
ϵ (electron capture)	100%

⁷³Se

mass number	73
neutron number	39
Relative Atomic Mass	72,926754881 ± 0,000007969 Da
g-factor	0,19822222222222 ± 0,0028888888888889
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	7,15 ± 0,09 h
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1948
Paritet	+

decay mode	Intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁷⁴Se

mass number	74
neutron number	40
Relative Atomic Mass	73,922475933 ± 0,000000015 Da
g-factor	0
natural abundance	0,86 ± 0,03
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1922
Paritet	+

decay mode	Intensitet
2β⁺ (double β⁺ decay)

⁷⁵Se

mass number	75
neutron number	41
Relative Atomic Mass	74,92252287 ± 0,000000078 Da
g-factor	0,2732 ± 0,004
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	119,78 ± 0,03 d
spin	5/2
nuclear quadrupole moment	1,1 ± 0,2
opdagelsesdato	1947
Paritet	+

decay mode	Intensitet
ϵ (electron capture)	100%

⁷⁶Se

mass number	76
neutron number	42
Relative Atomic Mass	75,919213702 ± 0,000000017 Da
g-factor	0
natural abundance	9,23 ± 0,07
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1922
Paritet	+

⁷⁷Se

mass number	77
neutron number	43
Relative Atomic Mass	76,91991415 ± 0,000000067 Da
g-factor	1,06712 ± 0,0001
natural abundance	7,6 ± 0,07
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1922
Paritet	-

⁷⁸Se

mass number	78
neutron number	44
Relative Atomic Mass	77,917309244 ± 0,000000191 Da
g-factor	0
natural abundance	23,69 ± 0,22
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1922
Paritet	+

⁷⁹Se

mass number	79
neutron number	45
Relative Atomic Mass	78,918499252 ± 0,000000238 Da
g-factor	-0,29085714285714 ± 0,0042857142857143
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	327 ± 28 ky
spin	7/2
nuclear quadrupole moment	0,8 ± 0,2
opdagelsesdato	1950
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁸⁰Se

mass number	80
neutron number	46
Relative Atomic Mass	79,916521761 ± 0,000001016 Da
g-factor	0
natural abundance	49,8 ± 0,36
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1922
Paritet	+

decay mode	Intensitet
2β⁻ (double β⁻ decay)

⁸¹Se

mass number	81
neutron number	47
Relative Atomic Mass	80,917993019 ± 0,000001049 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	18,45 ± 0,12 m
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1948
Paritet	-

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁸²Se

mass number	82
neutron number	48
Relative Atomic Mass	81,916699531 ± 0,0000005 Da
g-factor	0
natural abundance	8,82 ± 0,15
radioaktivitet	☢️ radioactive element
halveringstid	87,6 ± 1,5 Ey
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1922
Paritet	+

decay mode	Intensitet
2β⁻ (double β⁻ decay)	100%

⁸³Se

mass number	83
neutron number	49
Relative Atomic Mass	82,919118604 ± 0,000003259 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	22,25 ± 0,04 m
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1937
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁸⁴Se

mass number	84
neutron number	50
Relative Atomic Mass	83,918466761 ± 0,000002105 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	3,26 ± 0,1 m
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1960
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁸⁵Se

mass number	85
neutron number	51
Relative Atomic Mass	84,922260758 ± 0,000002804 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	32,9 ± 0,3 s
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1960
Paritet

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁸⁶Se

mass number	86
neutron number	52
Relative Atomic Mass	85,924311732 ± 0,000002705 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	14,3 ± 0,3 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1973
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁸⁷Se

mass number	87
neutron number	53
Relative Atomic Mass	86,928688616 ± 0,000002405 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	5,5 ± 0,06 s
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1968
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.6%

⁸⁸Se

mass number	88
neutron number	54
Relative Atomic Mass	87,93141749 ± 0,000003604 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,53 ± 0,06 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1970
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.99%

⁸⁹Se

mass number	89
neutron number	55
Relative Atomic Mass	88,936669058 ± 0,000004003 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	430 ± 50 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1971
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	7.8%

⁹⁰Se

mass number	90
neutron number	56
Relative Atomic Mass	89,940096 ± 0,000354 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	210 ± 80 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1994
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁹¹Se

mass number	91
neutron number	57
Relative Atomic Mass	90,9457 ± 0,000465 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	270 ± 50 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1975
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	21%
2n (2-neutron emission)

⁹²Se

mass number	92
neutron number	58
Relative Atomic Mass	91,94984 ± 0,000429 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁹³Se

mass number	93
neutron number	59
Relative Atomic Mass	92,956135 ± 0,000429 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁹⁴Se

mass number	94
neutron number	60
Relative Atomic Mass	93,96049 ± 0,000537 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁹⁵Se

mass number	95
neutron number	61
Relative Atomic Mass	94,9673 ± 0,000537 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	3/2
nuclear quadrupole moment
opdagelsesdato	2010
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

historie

opdager eller opfinder	Jöns Berzelius
fundsted	Sweden
opdagelsesdato	1818
etymologi	Greek: selênê (moon).
udtale	si-LEE-ni-em (engelsk)

source

Forekomst
Abundance in Earth's crust	0,05 mg/kg
natural abundance (verdenshave)	0,0002 mg/L
natural abundance (menneskelige krop)	0,000005 %
natural abundance (Meteoroid)	0,0013 %
natural abundance (Solen)
Abundance in Universe	0,000003 %

Nuclear Screening Constants

1	s	0.7378
2	p	3.9348
2	s	9.1116
3	d	15.523
3	p	15.295
3	s	14.5966
4	p	25.7128
4	s	24.2424

Selen on ChemicalAid

AUT NKC	ph127055
Art & Architecture Thesaurus ID	300156319
Australian Educational Vocabulary ID	scot/3574
BNCF	52421
BNE-identifikator	XX534324
BNF	121383271
Brockhaus Enzyklopädie online ID	selen
CAS-nummer	7782-49-2
ChEBI-ID	27568
ChemSpider ID	4885617
DSSTOX compound identifier	DTXCID701261
DSSTox substance ID	DTXSID9021261
Den Store Danske-ID	selen
Drugbank-ID	11135
ECHA Substance Infocard ID	100.029.052
Enciclopedia Treccani	selenio
Encyclopædia Britannica Online-ID	science/selenium
Encyclopædia Universalis-ID	selenium
Freebase-ID	/m/025sf8g
French Vikidia ID	Sélénium
GND-identifikator	4180872-1
HCIS ID	4102
HMDB-ID	HMDB0001349
HSDB-ID	4493
ICSC ID	0072
InChI	InChI=1S/Se
InChIKey	BUGBHKTXTAQXES-UHFFFAOYSA-N
KBpedia ID	Selenium
KEGG-ID	C01529
LCAuth	sh85119688
MeSH ID	D012643
NALT ID	33437
NCI Drug Dictionary ID	selenium
NDF-RT ID	N0000148196
NDL-nummer	00570819
National Library of Israel J9U ID	987007529471405171
OmegaWiki-betydningsdefinition	3373
OpenAlex ID	C553756173
PSH-ID	5808
PatientsLikeMe treatment ID	selenium
Probes And Drugs ID	PD056990
PubChem CID	6326970
Quora emne-ID	Selenium-2
Quora emne-ID	Selenium-element
RxNorm ID	9641
Store katalanske encyklopædi-ID	0238414
Store medisinske leksikon ID	selen
Store norske leksikon-ID	selen
Store russiske encyklopædi Online-ID	3546300
UK Archival Thesaurus ID	f2/mt225/4347/9119
UMLS CUI	C0036581
UNII	H6241UJ22B
USGS Thesaurus ID	1572
WikiSkripta ID	12122
Wolfram Language entity code	Entity["Mineral", "Selenium"]
WordNet 3.1 Synset ID	14678354-n
YSO ID	10413
ZVG-nummer	7340

Selen (Se)

Fysisk Egenskab

Kemisk Egenskab

øvrige

Isotopes of Selenium

63Se

64Se

65Se

66Se

67Se

68Se

69Se

70Se

71Se

72Se

73Se

74Se

75Se

76Se

77Se

78Se

79Se

80Se

81Se

82Se

83Se

84Se

85Se

86Se

87Se

88Se

89Se

90Se

91Se

92Se

93Se

94Se

95Se

historie

source

Nuclear Screening Constants

⁶³Se

⁶⁴Se

⁶⁵Se

⁶⁶Se

⁶⁷Se

⁶⁸Se

⁶⁹Se

⁷⁰Se

⁷¹Se

⁷²Se

⁷³Se

⁷⁴Se

⁷⁵Se

⁷⁶Se

⁷⁷Se

⁷⁸Se

⁷⁹Se

⁸⁰Se

⁸¹Se

⁸²Se

⁸³Se

⁸⁴Se

⁸⁵Se

⁸⁶Se

⁸⁷Se

⁸⁸Se

⁸⁹Se

⁹⁰Se

⁹¹Se

⁹²Se

⁹³Se

⁹⁴Se

⁹⁵Se