Atomic Number | 34 |
---|---|
Atomic Weight | 78.971 |
mass number | 80 |
Group | 16 |
---|---|
Period | 4 |
Block | p |
پروتون | 34 p+ |
---|---|
neutron | 46 n0 |
ئېلېكترون | 34 e- |
Atomic Radius | |
---|---|
molar volume | |
covalent radius | |
Metallic Radius | |
ionic radius | |
Crystal Radius | |
Van der Waals radius | |
density |
ئېنېرگىيە | |
---|---|
proton affinity | |
electron affinity | |
ionization energy | |
enthalpy of vaporization | |
enthalpy of fusion | |
standard enthalpy of formation | |
ئېلېكترون | |
ئېلېكترون قەۋەت | 2, 8, 18, 6 |
valence electron | 6 ⓘ |
electron configuration | [Ar] 3d10 4s2 4p4ⓘ 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4 |
oxidation number | -2, -1, 0, 1, 2, 3, 4, 5, 6 |
electronegativity | 2.55
|
Electrophilicity Index | |
fundamental state of matter | |
phase of matter | Solid |
gaseous state of matter | |
Boiling Point | |
Melting Point | |
critical pressure | |
critical temperature | |
triple point | |
appearance | |
color | Gray
|
appearance | black, red, and gray (not pictured) allotropes |
refractive index | 1.000895
|
thermodynamic material property | |
Thermal Conductivity | |
thermal expansion | |
molar heat capacity | |
Specific Heat Capacity | |
heat capacity ratio | |
electrical properties | |
type | |
electrical conductivity | |
electrical resistivity | |
superconductivity | |
magnetism | |
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 | |
structure | |
Crystal Structure | Simple Monoclinic (HEX) |
lattice constant | |
Lattice Angles | π/2, 1.58493, π/2 |
mechanical property | |
hardness | |
bulk modulus | |
shear modulus | |
Young's modulus | |
Poisson's ratio | 0.33
|
speed of sound | |
classification | |
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 |
Gas Basicity | |
---|---|
polarizability | |
C6 Dispersion Coefficient | |
allotrope | Amorphous Red Selenium, Amorphous Black Selenium, Monoclinic Selenium, Hexagonal Selenium |
Neutron cross section | 11.7
|
Neutron Mass Absorption | 0.0056
|
quantum number | 3P2 |
space group | 14 (P121/c1) |
Stable Isotopes | 3 |
---|---|
Unstable Isotopes | 30 |
Natural Isotopes | 6 |
mass number | 63 |
---|---|
neutron number | 29 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 13.2 ± 3.9 ms
|
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 2016 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 89% |
2p (2-proton emission) | 0.5% |
mass number | 64 |
---|---|
neutron number | 30 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 22.6 ± 0.2 ms
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 2005 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | |
β+ p (β+-delayed proton emission) |
mass number | 65 |
---|---|
neutron number | 31 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 34.2 ± 0.7 ms
|
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1993 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 87% |
mass number | 66 |
---|---|
neutron number | 32 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 54 ± 4 ms
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1993 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) |
mass number | 67 |
---|---|
neutron number | 33 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 133 ± 4 ms
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1991 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 0.5% |
mass number | 68 |
---|---|
neutron number | 34 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 35.5 ± 0.7 s
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1990 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
mass number | 69 |
---|---|
neutron number | 35 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 27.4 ± 0.2 s
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1974 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 0.052% |
mass number | 70 |
---|---|
neutron number | 36 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 41.1 ± 0.3 m
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1950 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
mass number | 71 |
---|---|
neutron number | 37 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 4.74 ± 0.05 m
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1957 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
mass number | 72 |
---|---|
neutron number | 38 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 8.4 ± 0.08 d
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1948 |
parity | + |
decay mode | intensity |
---|---|
ϵ (electron capture) | 100% |
mass number | 73 |
---|---|
neutron number | 39 |
Relative Atomic Mass | |
g-factor | 0.19822222222222 ± 0.0028888888888889
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 7.15 ± 0.09 h
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1948 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
mass number | 74 |
---|---|
neutron number | 40 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | 0.86 ± 0.03
|
radioactivity | ☢️ radioactive element |
half-life | |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1922 |
parity | + |
decay mode | intensity |
---|---|
2β+ (double β+ decay) |
mass number | 75 |
---|---|
neutron number | 41 |
Relative Atomic Mass | |
g-factor | 0.2732 ± 0.004
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 119.78 ± 0.03 d
|
spin | 5/2 |
nuclear quadrupole moment | 1.1 ± 0.2
|
time of discovery or invention | 1947 |
parity | + |
decay mode | intensity |
---|---|
ϵ (electron capture) | 100% |
mass number | 76 |
---|---|
neutron number | 42 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | 9.23 ± 0.07
|
radioactivity | stable isotope |
half-life | Not Radioactive ☢️ |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1922 |
parity | + |
mass number | 77 |
---|---|
neutron number | 43 |
Relative Atomic Mass | |
g-factor | 1.06712 ± 0.0001
|
natural abundance | 7.6 ± 0.07
|
radioactivity | stable isotope |
half-life | Not Radioactive ☢️ |
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1922 |
parity | - |
mass number | 78 |
---|---|
neutron number | 44 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | 23.69 ± 0.22
|
radioactivity | stable isotope |
half-life | Not Radioactive ☢️ |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1922 |
parity | + |
mass number | 79 |
---|---|
neutron number | 45 |
Relative Atomic Mass | |
g-factor | -0.29085714285714 ± 0.0042857142857143
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 327 ± 28 ky
|
spin | 7/2 |
nuclear quadrupole moment | 0.8 ± 0.2
|
time of discovery or invention | 1950 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 80 |
---|---|
neutron number | 46 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | 49.8 ± 0.36
|
radioactivity | ☢️ radioactive element |
half-life | |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1922 |
parity | + |
decay mode | intensity |
---|---|
2β− (double β− decay) |
mass number | 81 |
---|---|
neutron number | 47 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 18.45 ± 0.12 m
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1948 |
parity | - |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 82 |
---|---|
neutron number | 48 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | 8.82 ± 0.15
|
radioactivity | ☢️ radioactive element |
half-life | 87.6 ± 1.5 Ey
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1922 |
parity | + |
decay mode | intensity |
---|---|
2β− (double β− decay) | 100% |
mass number | 83 |
---|---|
neutron number | 49 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 22.25 ± 0.04 m
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1937 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 84 |
---|---|
neutron number | 50 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 3.26 ± 0.1 m
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1960 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 85 |
---|---|
neutron number | 51 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 32.9 ± 0.3 s
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1960 |
parity |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 86 |
---|---|
neutron number | 52 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 14.3 ± 0.3 s
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1973 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) |
mass number | 87 |
---|---|
neutron number | 53 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 5.5 ± 0.06 s
|
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1968 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.6% |
mass number | 88 |
---|---|
neutron number | 54 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.53 ± 0.06 s
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1970 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.99% |
mass number | 89 |
---|---|
neutron number | 55 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 430 ± 50 ms
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1971 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 7.8% |
mass number | 90 |
---|---|
neutron number | 56 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 210 ± 80 ms
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1994 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) |
mass number | 91 |
---|---|
neutron number | 57 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 270 ± 50 ms
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1975 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 21% |
2n (2-neutron emission) |
mass number | 92 |
---|---|
neutron number | 58 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1997 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
mass number | 93 |
---|---|
neutron number | 59 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1997 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
mass number | 94 |
---|---|
neutron number | 60 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1997 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
mass number | 95 |
---|---|
neutron number | 61 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 2010 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
discoverer or inventor | Jöns Berzelius |
---|---|
location of discovery | Sweden |
time of discovery or invention | 1818 |
etymology | Greek: selênê (moon). |
pronunciation | si-LEE-ni-em (ئىنگلىزچە) |
Abundance | |
---|---|
Abundance in Earth's crust | |
natural abundance (ئوكيانىيە) | |
natural abundance (human body) | 0.000005 %
|
natural abundance (meteoroid) | 0.0013 %
|
natural abundance (قۇياش) | |
Abundance in Universe | 0.000003 %
|
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 |