Selen (Se)

grundämne

Atomnummer	34
Atommassa	78.971
masstal	80

Grupp	16
Period	4
Block	p

Protoner	34 p⁺
Neutroner	46 n⁰
Electrons	34 e^-

Egenskaper

fysisk egenskap
atomradie	115 pm 224 pm
molvolym	16,5 cm³/mol
kovalent radie	116 pm 107 pm 107 pm 117 pm 120 pm
Metallic Radius	117 pm 140 pm
ionic radius	198 pm 50 pm 28 pm 42 pm
Crystal Radius	184 pm 64 pm 42 pm 56 pm
Van der Waalsradie	190 pm 190 pm 403 pm 190 pm 229 pm 420,5 pm
densitet	4,809 g/cm³ 3 990 kg/m³
energi
proton affinity
Elektronaffinitet	2,02067 eV/particle
joniseringsenergi	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

ångbildningsvärme	59,7 kJ/mol
smältvärme	5,23 kJ/mol
Bildningsentalpi	227,2 kJ/mol
Electrons
electron shell	2, 8, 18, 6

valenselektron	6

elektronkonfiguration	[Ar] 3d¹⁰ 4s² 4p⁴

oxidationstal	-2, -1, 0, 1, 2, 3, 4, 5, 6
elektronegativitet	14,34 eV/particle 0.2240328 2.55
Electrophilicity	2,2408492709619536 eV/particle
Phases
aggregationstillstånd	Fast
Gas Phase
Kokpunkt	958,15 K 958,15 K
Smältpunkt	453,15 K 493,95 K
critical pressure	27,2 MPa
critical temperature	1 766,15 K 1 766,15 K
trippelpunkt
Visual
färg	Grå #ff1493 #ffa100 #ffa100
appearance	black, red, and gray (not pictured) allotropes
Brytningsindex	1,000895
materialegenskap
Värmeledningsförmåga	0,52 W/(m K)
termisk expansion
molar heat capacity	25,363 J/(mol K)
Specifik värmekapacitet	0,321 J/(g⋅K)
heat capacity ratio
electrical properties
type
elektrisk konduktivitet
resistivitet
supraledare
magnetism
type	diamagnetic
magnetisk susceptibilitet (Mass)	−0,000000004 m³/Kg
magnetisk susceptibilitet (Molar)	−0,000000000316 m³/mol
magnetisk susceptibilitet (Volume)	−0,0000193
magnetic ordering
Curiepunkten
Néel temperature
Structure
Kristallstruktur	Enkelt monoklint (HEX)
Gitterkonstant	4,36 Å
Lattice Angles	π/2, 1.58493, π/2
mekanisk materialegenskap
hårdhet	736 MPa 2 MPa
Kompressibilitet	8,3 GPa
skjuvmodul	3,7 GPa
Young's modulus	10 GPa
Poissons konstant	0,33
ljudhastighet	3 350 m/s
klassificering
Kategori	Icke-metaller, Nonmetals
CAS Group	VIB
IUPAC Group	VIA
Glawe Number	95
Mendeleev Number	101
Pettifor Number	93
Geochemical Class	semi-volatile
Goldschmidt classification	chalcophile
övrigt
Gas Basicity
Dipole Polarizability	28,9 ± 1 a₀
C6 Dispersion Coefficient	210 a₀ 233 a₀
Allotropes	Amorphous Red Selenium, Amorphous Black Selenium, Monoclinic Selenium, Hexagonal Selenium
Träffyta	11,7
Neutron Mass Absorption	0,0056
kvanttal	3P2
rymdgrupp	14 (P121/c1)

Selenisotoper

Stabila isotoper	6
Instabila isotoper	27
Radioactive Isotopes	28

⁶³Se

natural abundance	Radioactive ☢️
relative atomic mass	62,981911 ± 0,000537 Da
masstal	63
g-factor
Halveringstid	13,2 ± 3,9 ms
Spinn	3/2
nuclear quadrupole moment
upptäcktsdatum	2016
Paritet	-

⁶³Se Decay Modes

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

⁶⁴Se

natural abundance	Radioactive ☢️
relative atomic mass	63,971165 ± 0,000537 Da
masstal	64
g-factor	0
Halveringstid	22,6 ± 0,2 ms
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	2005
Paritet	+

⁶⁴Se Decay Modes

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

⁶⁵Se

natural abundance	Radioactive ☢️
relative atomic mass	64,964552 ± 0,000322 Da
masstal	65
g-factor
Halveringstid	34,2 ± 0,7 ms
Spinn	3/2
nuclear quadrupole moment
upptäcktsdatum	1993
Paritet	-

⁶⁵Se Decay Modes

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

⁶⁶Se

natural abundance	Radioactive ☢️
relative atomic mass	65,955276 ± 0,000215 Da
masstal	66
g-factor	0
Halveringstid	54 ± 4 ms
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1993
Paritet	+

⁶⁶Se Decay Modes

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

⁶⁷Se

natural abundance	Radioactive ☢️
relative atomic mass	66,949994 ± 0,000072 Da
masstal	67
g-factor
Halveringstid	133 ± 4 ms
Spinn	5/2
nuclear quadrupole moment
upptäcktsdatum	1991
Paritet	-

⁶⁷Se Decay Modes

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

⁶⁸Se

natural abundance	Radioactive ☢️
relative atomic mass	67,941825236 ± 0,000000532 Da
masstal	68
g-factor	0
Halveringstid	35,5 ± 0,7 s
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1990
Paritet	+

⁶⁸Se Decay Modes

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

⁶⁹Se

natural abundance	Radioactive ☢️
relative atomic mass	68,939414845 ± 0,000001599 Da
masstal	69
g-factor
Halveringstid	27,4 ± 0,2 s
Spinn	1/2
nuclear quadrupole moment	0
upptäcktsdatum	1974
Paritet	-

⁶⁹Se Decay Modes

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

⁷⁰Se

natural abundance	Radioactive ☢️
relative atomic mass	69,933515521 ± 0,0000017 Da
masstal	70
g-factor	0
Halveringstid	41,1 ± 0,3 m
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1950
Paritet	+

⁷⁰Se Decay Modes

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

⁷¹Se

natural abundance	Radioactive ☢️
relative atomic mass	70,932209431 ± 0,000003 Da
masstal	71
g-factor
Halveringstid	4,74 ± 0,05 m
Spinn	5/2
nuclear quadrupole moment
upptäcktsdatum	1957
Paritet	-

⁷¹Se Decay Modes

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

⁷²Se

natural abundance	Radioactive ☢️
relative atomic mass	71,927140506 ± 0,0000021 Da
masstal	72
g-factor	0
Halveringstid	8,4 ± 0,08 d
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1948
Paritet	+

⁷²Se Decay Modes

decay mode	Intensitet
ϵ (electron capture)	100%

⁷³Se

natural abundance	Radioactive ☢️
relative atomic mass	72,926754881 ± 0,000007969 Da
masstal	73
g-factor	0,19822222222222 ± 0,0028888888888889
Halveringstid	7,15 ± 0,09 h
Spinn	9/2
nuclear quadrupole moment
upptäcktsdatum	1948
Paritet	+

⁷³Se Decay Modes

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

⁷⁴Se

natural abundance	0,86 ± 0,03
relative atomic mass	73,922475933 ± 0,000000015 Da
masstal	74
g-factor	0
Halveringstid
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1922
Paritet	+

⁷⁴Se Decay Modes

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

⁷⁵Se

natural abundance	Radioactive ☢️
relative atomic mass	74,92252287 ± 0,000000078 Da
masstal	75
g-factor	0,2732 ± 0,004
Halveringstid	119,78 ± 0,03 d
Spinn	5/2
nuclear quadrupole moment	1,1 ± 0,2
upptäcktsdatum	1947
Paritet	+

⁷⁵Se Decay Modes

decay mode	Intensitet
ϵ (electron capture)	100%

⁷⁶Se

natural abundance	9,23 ± 0,07
relative atomic mass	75,919213702 ± 0,000000017 Da
masstal	76
g-factor	0
Halveringstid
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1922
Paritet	+

⁷⁷Se

natural abundance	7,6 ± 0,07
relative atomic mass	76,91991415 ± 0,000000067 Da
masstal	77
g-factor	1,06712 ± 0,0001
Halveringstid
Spinn	1/2
nuclear quadrupole moment	0
upptäcktsdatum	1922
Paritet	-

⁷⁸Se

natural abundance	23,69 ± 0,22
relative atomic mass	77,917309244 ± 0,000000191 Da
masstal	78
g-factor	0
Halveringstid
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1922
Paritet	+

⁷⁹Se

natural abundance	Radioactive ☢️
relative atomic mass	78,918499252 ± 0,000000238 Da
masstal	79
g-factor	−0,29085714285714 ± 0,0042857142857143
Halveringstid	327 ± 28 ky
Spinn	7/2
nuclear quadrupole moment	0,8 ± 0,2
upptäcktsdatum	1950
Paritet	+

⁷⁹Se Decay Modes

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

⁸⁰Se

natural abundance	49,8 ± 0,36
relative atomic mass	79,916521761 ± 0,000001016 Da
masstal	80
g-factor	0
Halveringstid
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1922
Paritet	+

⁸⁰Se Decay Modes

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

⁸¹Se

natural abundance	Radioactive ☢️
relative atomic mass	80,917993019 ± 0,000001049 Da
masstal	81
g-factor
Halveringstid	18,45 ± 0,12 m
Spinn	1/2
nuclear quadrupole moment	0
upptäcktsdatum	1948
Paritet	-

⁸¹Se Decay Modes

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

⁸²Se

natural abundance	Radioactive ☢️ 8,82 ± 0,15
relative atomic mass	81,916699531 ± 0,0000005 Da
masstal	82
g-factor	0
Halveringstid	87,6 ± 1,5 Ey
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1922
Paritet	+

⁸²Se Decay Modes

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

⁸³Se

natural abundance	Radioactive ☢️
relative atomic mass	82,919118604 ± 0,000003259 Da
masstal	83
g-factor
Halveringstid	22,25 ± 0,04 m
Spinn	9/2
nuclear quadrupole moment
upptäcktsdatum	1937
Paritet	+

⁸³Se Decay Modes

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

⁸⁴Se

natural abundance	Radioactive ☢️
relative atomic mass	83,918466761 ± 0,000002105 Da
masstal	84
g-factor	0
Halveringstid	3,26 ± 0,1 m
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1960
Paritet	+

⁸⁴Se Decay Modes

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

⁸⁵Se

natural abundance	Radioactive ☢️
relative atomic mass	84,922260758 ± 0,000002804 Da
masstal	85
g-factor
Halveringstid	32,9 ± 0,3 s
Spinn	5/2
nuclear quadrupole moment
upptäcktsdatum	1960
Paritet

⁸⁵Se Decay Modes

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

⁸⁶Se

natural abundance	Radioactive ☢️
relative atomic mass	85,924311732 ± 0,000002705 Da
masstal	86
g-factor	0
Halveringstid	14,3 ± 0,3 s
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1973
Paritet	+

⁸⁶Se Decay Modes

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

⁸⁷Se

natural abundance	Radioactive ☢️
relative atomic mass	86,928688616 ± 0,000002405 Da
masstal	87
g-factor
Halveringstid	5,5 ± 0,06 s
Spinn	3/2
nuclear quadrupole moment
upptäcktsdatum	1968
Paritet	+

⁸⁷Se Decay Modes

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

⁸⁸Se

natural abundance	Radioactive ☢️
relative atomic mass	87,93141749 ± 0,000003604 Da
masstal	88
g-factor	0
Halveringstid	1,53 ± 0,06 s
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1970
Paritet	+

⁸⁸Se Decay Modes

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

⁸⁹Se

natural abundance	Radioactive ☢️
relative atomic mass	88,936669058 ± 0,000004003 Da
masstal	89
g-factor
Halveringstid	430 ± 50 ms
Spinn	5/2
nuclear quadrupole moment
upptäcktsdatum	1971
Paritet	+

⁸⁹Se Decay Modes

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

⁹⁰Se

natural abundance	Radioactive ☢️
relative atomic mass	89,940096 ± 0,000354 Da
masstal	90
g-factor	0
Halveringstid	210 ± 80 ms
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1994
Paritet	+

⁹⁰Se Decay Modes

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

⁹¹Se

natural abundance	Radioactive ☢️
relative atomic mass	90,9457 ± 0,000465 Da
masstal	91
g-factor
Halveringstid	270 ± 50 ms
Spinn	1/2
nuclear quadrupole moment	0
upptäcktsdatum	1975
Paritet	+

⁹¹Se Decay Modes

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

⁹²Se

natural abundance	Radioactive ☢️
relative atomic mass	91,94984 ± 0,000429 Da
masstal	92
g-factor	0
Halveringstid
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1997
Paritet	+

⁹²Se Decay Modes

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

⁹³Se

natural abundance	Radioactive ☢️
relative atomic mass	92,956135 ± 0,000429 Da
masstal	93
g-factor
Halveringstid
Spinn	1/2
nuclear quadrupole moment	0
upptäcktsdatum	1997
Paritet	+

⁹³Se Decay Modes

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

⁹⁴Se

natural abundance	Radioactive ☢️
relative atomic mass	93,96049 ± 0,000537 Da
masstal	94
g-factor	0
Halveringstid
Spinn	0
nuclear quadrupole moment	0
upptäcktsdatum	1997
Paritet	+

⁹⁴Se Decay Modes

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

⁹⁵Se

natural abundance	Radioactive ☢️
relative atomic mass	94,9673 ± 0,000537 Da
masstal	95
g-factor
Halveringstid
Spinn	3/2
nuclear quadrupole moment
upptäcktsdatum	2010
Paritet	+

⁹⁵Se Decay Modes

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

historia

upptäckare eller uppfinnare	Jöns Berzelius
fyndplats	Sweden
upptäcktsdatum	1818
etymologi	Greek: selênê (moon).
uttal	si-LEE-ni-em (engelska)

Sources

Förekomst
Abundance in Earth's crust	0,05 mg/kg
Abundance in Oceans	0,0002 mg/L
Abundance in Human Body	0,000005 %
Abundance in Meteor	0,0013 %
Abundance in Sun
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

ALLFO-ID	10413
Art & Architecture Thesaurus-ID	300156319
Australian Educational Vocabulary-ID	scot/3574
BNCF	52421
BNE-ID	XX534324
BNF-ID	121383271
Brockhaus Enzyklopädie-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
Gran Enciclopèdia Catalana-ID	0238414
HCIS ID	4102
HSDB ID	4493
Human Metabolome Database ID	HMDB0001349
ICSC-ID	0072
ID-nummer på Wikiscripta	12122
InChI	InChI=1S/Se
InChIKey	BUGBHKTXTAQXES-UHFFFAOYSA-N
J9U-ID	987007529471405171
KBpedia-ID	Selenium
KEGG-ID	C01529
MeSH-ID	D012643
MinDat mineral ID	37996
MinDat mineral ID	3611
NALT ID	33437
NDF-RT ID	N0000148196
NDL-ID	00570819
NKC-ID	ph127055
OmegaWiki Definierad Betydelse	3373
OpenAlex-ID	C553756173
PSH-ID	5808
PatientsLikeMe treatment ID	selenium
PubChem-ID (CID)	6326970
RxNorm-ID	9641
Stora ryska encyklopedin-ID	3546300
Store medisinske leksikon-ID	selen
Store norske leksikon-ID	selen
UK Archival Thesaurus-ID	f2/mt225/4347/9119
UMLS CUI	C0036581
UNII	H6241UJ22B
Vikidia-ID (franska)	Sélénium
ZVG-nummer	7340
entitets-id i Wolfram language	Entity["Mineral", "Selenium"]
id-nummer i Deutsche Nationalbibliotheks katalog	4180872-1
id-nummer i USA:s kongressbiblioteks katalog	sh85119688
synset-ID på WordNet 3.1	14678354-n
ämnes-ID på Quora	Selenium-2
ämnes-ID på Quora	Selenium-element

Selen (Se)

Egenskaper

Selenisotoper

63Se

63Se Decay Modes

64Se

64Se Decay Modes

65Se

65Se Decay Modes

66Se

66Se Decay Modes

67Se

67Se Decay Modes

68Se

68Se Decay Modes

69Se

69Se Decay Modes

70Se

70Se Decay Modes

71Se

71Se Decay Modes

72Se

72Se Decay Modes

73Se

73Se Decay Modes

74Se

74Se Decay Modes

75Se

75Se Decay Modes

76Se

77Se

78Se

79Se

79Se Decay Modes

80Se

80Se Decay Modes

81Se

81Se Decay Modes

82Se

82Se Decay Modes

83Se

83Se Decay Modes

84Se

84Se Decay Modes

85Se

85Se Decay Modes

86Se

86Se Decay Modes

87Se

87Se Decay Modes

88Se

88Se Decay Modes

89Se

89Se Decay Modes

90Se

90Se Decay Modes

91Se

91Se Decay Modes

92Se

92Se Decay Modes

93Se

93Se Decay Modes

94Se

94Se Decay Modes

95Se

95Se Decay Modes

historia

Sources

Nuclear Screening Constants

⁶³Se

⁶³Se Decay Modes

⁶⁴Se

⁶⁴Se Decay Modes

⁶⁵Se

⁶⁵Se Decay Modes

⁶⁶Se

⁶⁶Se Decay Modes

⁶⁷Se

⁶⁷Se Decay Modes

⁶⁸Se

⁶⁸Se Decay Modes

⁶⁹Se

⁶⁹Se Decay Modes

⁷⁰Se

⁷⁰Se Decay Modes

⁷¹Se

⁷¹Se Decay Modes

⁷²Se

⁷²Se Decay Modes

⁷³Se

⁷³Se Decay Modes

⁷⁴Se

⁷⁴Se Decay Modes

⁷⁵Se

⁷⁵Se Decay Modes

⁷⁶Se

⁷⁷Se

⁷⁸Se

⁷⁹Se

⁷⁹Se Decay Modes

⁸⁰Se

⁸⁰Se Decay Modes

⁸¹Se

⁸¹Se Decay Modes

⁸²Se

⁸²Se Decay Modes

⁸³Se

⁸³Se Decay Modes

⁸⁴Se

⁸⁴Se Decay Modes

⁸⁵Se

⁸⁵Se Decay Modes

⁸⁶Se

⁸⁶Se Decay Modes

⁸⁷Se

⁸⁷Se Decay Modes

⁸⁸Se

⁸⁸Se Decay Modes

⁸⁹Se

⁸⁹Se Decay Modes

⁹⁰Se

⁹⁰Se Decay Modes

⁹¹Se

⁹¹Se Decay Modes

⁹²Se

⁹²Se Decay Modes

⁹³Se

⁹³Se Decay Modes

⁹⁴Se

⁹⁴Se Decay Modes

⁹⁵Se

⁹⁵Se Decay Modes