Atomnummer | 34 |
---|---|
Atommassa | 78.971 |
masstal | 80 |
Grupp | 16 |
---|---|
Period | 4 |
Block | p |
Protoner | 34 p+ |
---|---|
Neutroner | 46 n0 |
Electrons | 34 e- |
fysisk egenskap | |
---|---|
atomradie | 115 pm
|
molvolym | 16,5 cm³/mol
|
kovalent radie | 116 pm
|
Metallic Radius | 117 pm
|
ionic radius | 198 pm
|
Crystal Radius | 184 pm
|
Van der Waalsradie | 190 pm
|
densitet | 4,809 g/cm³
|
energi | |
proton affinity | |
Elektronaffinitet | 2,02067 eV/particle
|
joniseringsenergi | 9,752392 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 | 2.55
|
Electrophilicity | 2,2408492709619536 eV/particle
|
Phases | |
aggregationstillstånd | Fast |
Gas Phase | |
Kokpunkt | 958,15 K
|
Smältpunkt | 453,15 K
|
critical pressure | |
critical temperature | 1 766,15 K
|
trippelpunkt | |
Visual | |
färg | Grå
|
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 | 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 | |
C6 Dispersion Coefficient | 210 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) |
Stabila isotoper | 6 |
---|---|
Instabila isotoper | 27 |
Radioactive Isotopes | 28 |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 63 |
g-factor | |
Halveringstid | 13,2 ± 3,9 ms
|
Spinn | 3/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 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% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 64 |
g-factor | 0
|
Halveringstid | 22,6 ± 0,2 ms
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 2005 |
Paritet | + |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | % |
β+ p (β+-delayed proton emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 65 |
g-factor | |
Halveringstid | 34,2 ± 0,7 ms
|
Spinn | 3/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1993 |
Paritet | - |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 87% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 66 |
g-factor | 0
|
Halveringstid | 54 ± 4 ms
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1993 |
Paritet | + |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 67 |
g-factor | |
Halveringstid | 133 ± 4 ms
|
Spinn | 5/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1991 |
Paritet | - |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 0.5% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 68 |
g-factor | 0
|
Halveringstid | 35,5 ± 0,7 s
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1990 |
Paritet | + |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 69 |
g-factor | |
Halveringstid | 27,4 ± 0,2 s
|
Spinn | 1/2 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1974 |
Paritet | - |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 0.052% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 70 |
g-factor | 0
|
Halveringstid | 41,1 ± 0,3 m
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1950 |
Paritet | + |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 71 |
g-factor | |
Halveringstid | 4,74 ± 0,05 m
|
Spinn | 5/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1957 |
Paritet | - |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 72 |
g-factor | 0
|
Halveringstid | 8,4 ± 0,08 d
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1948 |
Paritet | + |
decay mode | Intensitet |
---|---|
ϵ (electron capture) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 73 |
g-factor | 0,19822222222222 ± 0,0028888888888889
|
Halveringstid | 7,15 ± 0,09 h
|
Spinn | 9/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1948 |
Paritet | + |
decay mode | Intensitet |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
natural abundance | 0,86 ± 0,03
|
---|---|
relative atomic mass | |
masstal | 74 |
g-factor | 0
|
Halveringstid | |
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1922 |
Paritet | + |
decay mode | Intensitet |
---|---|
2β+ (double β+ decay) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
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 | + |
decay mode | Intensitet |
---|---|
ϵ (electron capture) | 100% |
natural abundance | 9,23 ± 0,07
|
---|---|
relative atomic mass | |
masstal | 76 |
g-factor | 0
|
Halveringstid | |
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1922 |
Paritet | + |
natural abundance | 7,6 ± 0,07
|
---|---|
relative atomic mass | |
masstal | 77 |
g-factor | 1,06712 ± 0,0001
|
Halveringstid | |
Spinn | 1/2 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1922 |
Paritet | - |
natural abundance | 23,69 ± 0,22
|
---|---|
relative atomic mass | |
masstal | 78 |
g-factor | 0
|
Halveringstid | |
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1922 |
Paritet | + |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
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 | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
natural abundance | 49,8 ± 0,36
|
---|---|
relative atomic mass | |
masstal | 80 |
g-factor | 0
|
Halveringstid | |
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1922 |
Paritet | + |
decay mode | Intensitet |
---|---|
2β− (double β− decay) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 81 |
g-factor | |
Halveringstid | 18,45 ± 0,12 m
|
Spinn | 1/2 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1948 |
Paritet | - |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
natural abundance | Radioactive ☢️ 8,82 ± 0,15
|
---|---|
relative atomic mass | |
masstal | 82 |
g-factor | 0
|
Halveringstid | 87,6 ± 1,5 Ey
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1922 |
Paritet | + |
decay mode | Intensitet |
---|---|
2β− (double β− decay) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 83 |
g-factor | |
Halveringstid | 22,25 ± 0,04 m
|
Spinn | 9/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1937 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 84 |
g-factor | 0
|
Halveringstid | 3,26 ± 0,1 m
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1960 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 85 |
g-factor | |
Halveringstid | 32,9 ± 0,3 s
|
Spinn | 5/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1960 |
Paritet |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 86 |
g-factor | 0
|
Halveringstid | 14,3 ± 0,3 s
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1973 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 87 |
g-factor | |
Halveringstid | 5,5 ± 0,06 s
|
Spinn | 3/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1968 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.6% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 88 |
g-factor | 0
|
Halveringstid | 1,53 ± 0,06 s
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1970 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.99% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 89 |
g-factor | |
Halveringstid | 430 ± 50 ms
|
Spinn | 5/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 1971 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 7.8% |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 90 |
g-factor | 0
|
Halveringstid | 210 ± 80 ms
|
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1994 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 91 |
g-factor | |
Halveringstid | 270 ± 50 ms
|
Spinn | 1/2 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1975 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 21% |
2n (2-neutron emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 92 |
g-factor | 0
|
Halveringstid | |
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1997 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 93 |
g-factor | |
Halveringstid | |
Spinn | 1/2 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1997 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 94 |
g-factor | 0
|
Halveringstid | |
Spinn | 0 |
nuclear quadrupole moment | 0
|
upptäcktsdatum | 1997 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
natural abundance | Radioactive ☢️ |
---|---|
relative atomic mass | |
masstal | 95 |
g-factor | |
Halveringstid | |
Spinn | 3/2 |
nuclear quadrupole moment | |
upptäcktsdatum | 2010 |
Paritet | + |
decay mode | Intensitet |
---|---|
β− (β− decay) | % |
β− n (β−-delayed neutron emission) | % |
2n (2-neutron emission) | % |
upptäckare eller uppfinnare | Jöns Berzelius |
---|---|
fyndplats | Sweden |
upptäcktsdatum | 1818 |
etymologi | Greek: selênê (moon). |
uttal | si-LEE-ni-em (engelska) |
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 |