Selen (Se)

chemical element with symbol Se and atomic number 34

Atomic Number	34
Atomic Weight	78.971
Numri i masës	80

Group	16
Period	4
Block	p

protoni	34 p⁺
neutroni	46 n⁰
elektroni	34 e^-

Tipar Fizik

Atomic Radius	115 pm 224 pm
molar volume	16,5 cm³/mol
covalent radius	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 Waals radius	190 pm 190 pm 403 pm 190 pm 229 pm 420,5 pm
density	4,809 g/cm³ 3 990 kg/m³

Chemical Property

energjia

proton affinity
electron affinity	2,02067 eV/particle
ionization energy	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

enthalpy of vaporization	59,7 kJ/mol
enthalpy of fusion	5,23 kJ/mol
standard enthalpy of formation	227,2 kJ/mol
elektroni

electron shell	2, 8, 18, 6

valence electron	6 ⓘ

konfigurimi i elektronit	[Ar] 3d¹⁰ 4s² 4p⁴ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁴

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

gjendja agregate e materies	Solid
gaseous state of matter
Boiling Point	958,15 K 958,15 K
Melting Point	453,15 K 493,95 K
critical pressure	27,2 MPa
critical temperature	1 766,15 K 1 766,15 K
triple point
appearance
Ngjyra	Gray #ff1493 #ffa100 #ffa100
appearance	black, 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
type	diamagnetic
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 Structure	Simple Monoclinic (HEX)
lattice constant	4,36 Å
Lattice Angles	π/2, 1.58493, π/2
mechanical property
hardness	736 MPa 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
Category	Other nonmetals, Nonmetals
CAS Group	VIB
IUPAC Group	VIA
Glawe Number	95
Mendeleev Number	101
Pettifor Number	93
Geochemical Class	semi-volatile
Goldschmidt classification	chalcophile

other

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
numër kuantik	3P2
space group	14 (P121/c1)

Isotopes of Selenium

Stable Isotopes	3
Unstable Isotopes	30
Natural Isotopes	6

⁶³Se

Numri i masës	63
numri i neutroneve	29
Relative Atomic Mass	62,981911 ± 0,000537 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	13,2 ± 3,9 ms
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2016
parity	-

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

⁶⁴Se

Numri i masës	64
numri i neutroneve	30
Relative Atomic Mass	63,971165 ± 0,000537 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	22,6 ± 0,2 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	2005
parity	+

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

⁶⁵Se

Numri i masës	65
numri i neutroneve	31
Relative Atomic Mass	64,964552 ± 0,000322 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	34,2 ± 0,7 ms
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1993
parity	-

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

⁶⁶Se

Numri i masës	66
numri i neutroneve	32
Relative Atomic Mass	65,955276 ± 0,000215 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	54 ± 4 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1993
parity	+

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

⁶⁷Se

Numri i masës	67
numri i neutroneve	33
Relative Atomic Mass	66,949994 ± 0,000072 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	133 ± 4 ms
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1991
parity	-

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

⁶⁸Se

Numri i masës	68
numri i neutroneve	34
Relative Atomic Mass	67,941825236 ± 0,000000532 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	35,5 ± 0,7 s
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1990
parity	+

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

⁶⁹Se

Numri i masës	69
numri i neutroneve	35
Relative Atomic Mass	68,939414845 ± 0,000001599 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	27,4 ± 0,2 s
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1974
parity	-

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

⁷⁰Se

Numri i masës	70
numri i neutroneve	36
Relative Atomic Mass	69,933515521 ± 0,0000017 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	41,1 ± 0,3 m
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1950
parity	+

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

⁷¹Se

Numri i masës	71
numri i neutroneve	37
Relative Atomic Mass	70,932209431 ± 0,000003 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	4,74 ± 0,05 m
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1957
parity	-

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

⁷²Se

Numri i masës	72
numri i neutroneve	38
Relative Atomic Mass	71,927140506 ± 0,0000021 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	8,4 ± 0,08 d
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1948
parity	+

decay mode	intensitet
ϵ (electron capture)	100%

⁷³Se

Numri i masës	73
numri i neutroneve	39
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
Spini	9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1948
parity	+

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

⁷⁴Se

Numri i masës	74
numri i neutroneve	40
Relative Atomic Mass	73,922475933 ± 0,000000015 Da
g-factor	0
natural abundance	0,86 ± 0,03
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1922
parity	+

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

⁷⁵Se

Numri i masës	75
numri i neutroneve	41
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
Spini	5/2
nuclear quadrupole moment	1,1 ± 0,2
koha e zbulimit apo shpikjes	1947
parity	+

decay mode	intensitet
ϵ (electron capture)	100%

⁷⁶Se

Numri i masës	76
numri i neutroneve	42
Relative Atomic Mass	75,919213702 ± 0,000000017 Da
g-factor	0
natural abundance	9,23 ± 0,07
Radioaktivitet	stable isotope
half-life	Not Radioactive ☢️
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1922
parity	+

⁷⁷Se

Numri i masës	77
numri i neutroneve	43
Relative Atomic Mass	76,91991415 ± 0,000000067 Da
g-factor	1,06712 ± 0,0001
natural abundance	7,6 ± 0,07
Radioaktivitet	stable isotope
half-life	Not Radioactive ☢️
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1922
parity	-

⁷⁸Se

Numri i masës	78
numri i neutroneve	44
Relative Atomic Mass	77,917309244 ± 0,000000191 Da
g-factor	0
natural abundance	23,69 ± 0,22
Radioaktivitet	stable isotope
half-life	Not Radioactive ☢️
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1922
parity	+

⁷⁹Se

Numri i masës	79
numri i neutroneve	45
Relative Atomic Mass	78,918499252 ± 0,000000238 Da
g-factor	-0,29085714285714 ± 0,0042857142857143
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	327 ± 28 ky
Spini	7/2
nuclear quadrupole moment	0,8 ± 0,2
koha e zbulimit apo shpikjes	1950
parity	+

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

⁸⁰Se

Numri i masës	80
numri i neutroneve	46
Relative Atomic Mass	79,916521761 ± 0,000001016 Da
g-factor	0
natural abundance	49,8 ± 0,36
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1922
parity	+

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

⁸¹Se

Numri i masës	81
numri i neutroneve	47
Relative Atomic Mass	80,917993019 ± 0,000001049 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	18,45 ± 0,12 m
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1948
parity	-

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

⁸²Se

Numri i masës	82
numri i neutroneve	48
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
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1922
parity	+

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

⁸³Se

Numri i masës	83
numri i neutroneve	49
Relative Atomic Mass	82,919118604 ± 0,000003259 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	22,25 ± 0,04 m
Spini	9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1937
parity	+

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

⁸⁴Se

Numri i masës	84
numri i neutroneve	50
Relative Atomic Mass	83,918466761 ± 0,000002105 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	3,26 ± 0,1 m
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1960
parity	+

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

⁸⁵Se

Numri i masës	85
numri i neutroneve	51
Relative Atomic Mass	84,922260758 ± 0,000002804 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	32,9 ± 0,3 s
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1960
parity

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

⁸⁶Se

Numri i masës	86
numri i neutroneve	52
Relative Atomic Mass	85,924311732 ± 0,000002705 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	14,3 ± 0,3 s
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1973
parity	+

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

⁸⁷Se

Numri i masës	87
numri i neutroneve	53
Relative Atomic Mass	86,928688616 ± 0,000002405 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	5,5 ± 0,06 s
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1968
parity	+

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

⁸⁸Se

Numri i masës	88
numri i neutroneve	54
Relative Atomic Mass	87,93141749 ± 0,000003604 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,53 ± 0,06 s
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1970
parity	+

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

⁸⁹Se

Numri i masës	89
numri i neutroneve	55
Relative Atomic Mass	88,936669058 ± 0,000004003 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	430 ± 50 ms
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1971
parity	+

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

⁹⁰Se

Numri i masës	90
numri i neutroneve	56
Relative Atomic Mass	89,940096 ± 0,000354 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	210 ± 80 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1994
parity	+

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

⁹¹Se

Numri i masës	91
numri i neutroneve	57
Relative Atomic Mass	90,9457 ± 0,000465 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	270 ± 50 ms
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1975
parity	+

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

⁹²Se

Numri i masës	92
numri i neutroneve	58
Relative Atomic Mass	91,94984 ± 0,000429 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1997
parity	+

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

⁹³Se

Numri i masës	93
numri i neutroneve	59
Relative Atomic Mass	92,956135 ± 0,000429 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1997
parity	+

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

⁹⁴Se

Numri i masës	94
numri i neutroneve	60
Relative Atomic Mass	93,96049 ± 0,000537 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1997
parity	+

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

⁹⁵Se

Numri i masës	95
numri i neutroneve	61
Relative Atomic Mass	94,9673 ± 0,000537 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2010
parity	+

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

historia

zbulues	Jöns Berzelius
vendndodhja e zbulimit	Sweden
koha e zbulimit apo shpikjes	1818
Etimologjia	Greek: selênê (moon).
pronunciation	si-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

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

Art & Architecture Thesaurus ID	300156319
Australian Educational Vocabulary ID	scot/3574
BNCF Thesaurus ID	52421
Biblioteca Nacional de España ID	XX534324
Brockhaus Enzyklopädie online ID	selen
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
Encyclopædia Britannica Online ID	science/selenium
Encyclopædia Universalis ID	selenium
Freebase ID	/m/025sf8g
French Vikidia ID	Sélénium
GND ID	4180872-1
Gran Enciclopèdia Catalana ID	0238414
Great Russian Encyclopedia Online ID	3546300
HCIS ID	4102
HSDB ID	4493
Human Metabolome Database ID	HMDB0001349
ICSC ID	0072
InChI	InChI=1S/Se
InChIKey	BUGBHKTXTAQXES-UHFFFAOYSA-N
KBpedia ID	Selenium
KEGG ID	C01529
Library of Congress ID	sh85119688
MeSH descriptor ID	D012643
NALT ID	33437
NCI Drug Dictionary ID	selenium
NDF-RT ID	N0000148196
NDL Authority ID	00570819
NKCR AUT ID	ph127055
National Library of Israel J9U ID	987007529471405171
OmegaWiki Defined Meaning	3373
OpenAlex ID	C553756173
PSH ID	5808
PatientsLikeMe treatment ID	selenium
Probes And Drugs ID	PD056990
PubChem CID	6326970
Quora topic ID	Selenium-2
Quora topic ID	Selenium-element
RxNorm ID	9641
Store medisinske leksikon ID	selen
Store norske leksikon ID	selen
Treccani ID	selenio
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 number	7340
identifikues i BNF	121383271
numri CAS	7782-49-2

Selen (Se)

Tipar Fizik

Chemical Property

other

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

historia

burim

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