Selenij (Se)

chemical element with symbol Se and atomic number 34

Atomski broj	34
Relativna atomska masa	78.971
Maseni broj	80

Skupina	16
Perioda	4
Blok	p

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

Animated Bohrov model atoma of Se (Selenij)

Physical Property

Atomski Radijus	115 pm 224 pm
Molni volumen	16,5 cm³/mol
Kovalentni Radijus	116 pm 107 pm 107 pm 117 pm 120 pm
Metallic Radius	117 pm 140 pm
Ionski radijus	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
gustoća	4,809 g/cm³ 3.990 kg/m³

Kemijsko Svojstvo

{ERROR}

energija

proton affinity
Elektronski afinitet	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

Toplina isparivanja	59,7 kJ/mol
toplina taljenja	5,23 kJ/mol
standard enthalpy of formation	227,2 kJ/mol
elektron

Elektronska ljuska	2, 8, 18, 6

valence electron	6 ⓘ

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

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

agregatno stanje
gaseous state of matter
Vrelište	958,15 K 958,15 K
Talište	453,15 K 493,95 K
critical pressure	27,2 MPa
critical temperature	1.766,15 K 1.766,15 K
Trojna točka
appearance
boja	Crna #ff1493 #ffa100 #ffa100
appearance	black, red, and gray (not pictured) allotropes
Indeks prelamanja	1,000895
thermodynamic material property
Toplinska vodljivost	0,52 W/(m K)
Toplinsko istezanje
molar heat capacity	25,363 J/(mol K)
Specifični toplinski kapacitet	0,321 J/(g⋅K)
heat capacity ratio
electrical properties
type
electrical conductivity
Električna otpornost i provodnost
Supravodljivost
Magnetizam
type	diamagnetic
Magnetna susceptibilnost (Mass)	−0,000000004 m³/Kg
Magnetna susceptibilnost (Molar)	−0,000000000316 m³/mol
Magnetna susceptibilnost (Volume)	−0,0000193
magnetic ordering
Curieva temperatura
Néel temperature
struktura
Kristalna struktura	{ERROR}
lattice constant	4,36 Å
Lattice Angles	π/2, 1.58493, π/2
mechanical property
Tvrdoća	736 MPa 2 MPa
bulk modulus	8,3 GPa
shear modulus	3,7 GPa
Youngov modul elastičnosti	10 GPa
Poissonov omjer	0,33
brzina zvuka	3.350 m/s
classification
Kategorija	Aktinoidi, 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
Nuklearni udarni presjek	11,7
Neutron Mass Absorption	0,0056
Kvantni brojevi	3P2
space group	14 (P121/c1)

Isotopes of Selenium

Stabilni izotopi	3
Nestabilni izotopi	30
Natural Isotopes	6

⁶³Se

Maseni broj	63
neutron number	29
Relativna Atomska Masa	62,981911 ± 0,000537 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	13,2 ± 3,9 ms
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	2016
Parnost	-

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

⁶⁴Se

Maseni broj	64
neutron number	30
Relativna Atomska Masa	63,971165 ± 0,000537 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	22,6 ± 0,2 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	2005
Parnost	+

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

⁶⁵Se

Maseni broj	65
neutron number	31
Relativna Atomska Masa	64,964552 ± 0,000322 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	34,2 ± 0,7 ms
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1993
Parnost	-

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

⁶⁶Se

Maseni broj	66
neutron number	32
Relativna Atomska Masa	65,955276 ± 0,000215 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	54 ± 4 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1993
Parnost	+

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

⁶⁷Se

Maseni broj	67
neutron number	33
Relativna Atomska Masa	66,949994 ± 0,000072 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	133 ± 4 ms
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1991
Parnost	-

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

⁶⁸Se

Maseni broj	68
neutron number	34
Relativna Atomska Masa	67,941825236 ± 0,000000532 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	35,5 ± 0,7 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1990
Parnost	+

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

⁶⁹Se

Maseni broj	69
neutron number	35
Relativna Atomska Masa	68,939414845 ± 0,000001599 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	27,4 ± 0,2 s
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1974
Parnost	-

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

⁷⁰Se

Maseni broj	70
neutron number	36
Relativna Atomska Masa	69,933515521 ± 0,0000017 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	41,1 ± 0,3 m
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1950
Parnost	+

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

⁷¹Se

Maseni broj	71
neutron number	37
Relativna Atomska Masa	70,932209431 ± 0,000003 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4,74 ± 0,05 m
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1957
Parnost	-

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

⁷²Se

Maseni broj	72
neutron number	38
Relativna Atomska Masa	71,927140506 ± 0,0000021 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	8,4 ± 0,08 d
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1948
Parnost	+

decay mode	intensity
ϵ (electron capture)	100%

⁷³Se

Maseni broj	73
neutron number	39
Relativna Atomska Masa	72,926754881 ± 0,000007969 Da
g-factor	0,19822222222222 ± 0,0028888888888889
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	7,15 ± 0,09 h
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1948
Parnost	+

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

⁷⁴Se

Maseni broj	74
neutron number	40
Relativna Atomska Masa	73,922475933 ± 0,000000015 Da
g-factor	0
natural abundance	0,86 ± 0,03
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1922
Parnost	+

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

⁷⁵Se

Maseni broj	75
neutron number	41
Relativna Atomska Masa	74,92252287 ± 0,000000078 Da
g-factor	0,2732 ± 0,004
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	119,78 ± 0,03 d
spin	5/2
nuclear quadrupole moment	1,1 ± 0,2
vrijeme otkrića ili izuma	1947
Parnost	+

decay mode	intensity
ϵ (electron capture)	100%

⁷⁶Se

Maseni broj	76
neutron number	42
Relativna Atomska Masa	75,919213702 ± 0,000000017 Da
g-factor	0
natural abundance	9,23 ± 0,07
radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1922
Parnost	+

⁷⁷Se

Maseni broj	77
neutron number	43
Relativna Atomska Masa	76,91991415 ± 0,000000067 Da
g-factor	1,06712 ± 0,0001
natural abundance	7,6 ± 0,07
radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1922
Parnost	-

⁷⁸Se

Maseni broj	78
neutron number	44
Relativna Atomska Masa	77,917309244 ± 0,000000191 Da
g-factor	0
natural abundance	23,69 ± 0,22
radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1922
Parnost	+

⁷⁹Se

Maseni broj	79
neutron number	45
Relativna Atomska Masa	78,918499252 ± 0,000000238 Da
g-factor	−0,29085714285714 ± 0,0042857142857143
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	327 ± 28 ky
spin	7/2
nuclear quadrupole moment	0,8 ± 0,2
vrijeme otkrića ili izuma	1950
Parnost	+

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

⁸⁰Se

Maseni broj	80
neutron number	46
Relativna Atomska Masa	79,916521761 ± 0,000001016 Da
g-factor	0
natural abundance	49,8 ± 0,36
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1922
Parnost	+

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

⁸¹Se

Maseni broj	81
neutron number	47
Relativna Atomska Masa	80,917993019 ± 0,000001049 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	18,45 ± 0,12 m
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1948
Parnost	-

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

⁸²Se

Maseni broj	82
neutron number	48
Relativna Atomska Masa	81,916699531 ± 0,0000005 Da
g-factor	0
natural abundance	8,82 ± 0,15
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	87,6 ± 1,5 Ey
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1922
Parnost	+

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

⁸³Se

Maseni broj	83
neutron number	49
Relativna Atomska Masa	82,919118604 ± 0,000003259 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	22,25 ± 0,04 m
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1937
Parnost	+

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

⁸⁴Se

Maseni broj	84
neutron number	50
Relativna Atomska Masa	83,918466761 ± 0,000002105 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	3,26 ± 0,1 m
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1960
Parnost	+

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

⁸⁵Se

Maseni broj	85
neutron number	51
Relativna Atomska Masa	84,922260758 ± 0,000002804 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	32,9 ± 0,3 s
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1960
Parnost

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

⁸⁶Se

Maseni broj	86
neutron number	52
Relativna Atomska Masa	85,924311732 ± 0,000002705 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	14,3 ± 0,3 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1973
Parnost	+

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

⁸⁷Se

Maseni broj	87
neutron number	53
Relativna Atomska Masa	86,928688616 ± 0,000002405 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	5,5 ± 0,06 s
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1968
Parnost	+

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

⁸⁸Se

Maseni broj	88
neutron number	54
Relativna Atomska Masa	87,93141749 ± 0,000003604 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,53 ± 0,06 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1970
Parnost	+

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

⁸⁹Se

Maseni broj	89
neutron number	55
Relativna Atomska Masa	88,936669058 ± 0,000004003 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	430 ± 50 ms
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1971
Parnost	+

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

⁹⁰Se

Maseni broj	90
neutron number	56
Relativna Atomska Masa	89,940096 ± 0,000354 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	210 ± 80 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1994
Parnost	+

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

⁹¹Se

Maseni broj	91
neutron number	57
Relativna Atomska Masa	90,9457 ± 0,000465 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	270 ± 50 ms
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1975
Parnost	+

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

⁹²Se

Maseni broj	92
neutron number	58
Relativna Atomska Masa	91,94984 ± 0,000429 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1997
Parnost	+

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

⁹³Se

Maseni broj	93
neutron number	59
Relativna Atomska Masa	92,956135 ± 0,000429 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1997
Parnost	+

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

⁹⁴Se

Maseni broj	94
neutron number	60
Relativna Atomska Masa	93,96049 ± 0,000537 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1997
Parnost	+

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

⁹⁵Se

Maseni broj	95
neutron number	61
Relativna Atomska Masa	94,9673 ± 0,000537 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	2010
Parnost	+

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

povijest

otkrio/izumio	Jöns Berzelius
location of discovery	Sweden
vrijeme otkrića ili izuma	1818
Etimologija	Greek: selênê (moon).
pronunciation	si-LEE-ni-em (engleski)

source

Obilnost
Zastupljenost u Zemljinoj kori	0,05 mg/kg
natural abundance (ocean)	0,0002 mg/L
natural abundance (tijelo)	0,000005 %
natural abundance (meteoroid)	0,0013 %
natural abundance (Sunce)
Zastupljenost u svemiru	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

Selenij on ChemicalAid

Selenij (Se)

Physical Property

Kemijsko Svojstvo

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

povijest

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