Atomic Number | 91 |
---|---|
Atomic Weight | 231.03588 |
mass number | 231 |
Group | |
---|---|
Period | 7 |
Block | f |
proton | 91 p+ |
---|---|
neutron | 140 n0 |
electron | 91 e- |
Atomic Radius | |
---|---|
molar volume | |
covalent radius | |
Metallic Radius | |
ionic radius | |
Crystal Radius | |
Van der Waals radius | |
density |
energy | |
---|---|
proton affinity | |
electron affinity | |
ionization energy | |
enthalpy of vaporization | |
enthalpy of fusion | |
standard enthalpy of formation | |
electron | |
electron shell | 2, 8, 18, 32, 20, 9, 2 |
valence electron | 2 ⓘ |
electron configuration | [Rn] 5f2 6d1 7s2ⓘ 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f2 6d1 7s2 |
oxidation number | 2, 3, 4, 5 |
electronegativity |
1.5
|
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 | Silver
|
appearance | bright, silvery metallic luster |
refractive index | |
thermodynamic material property | |
Thermal Conductivity | |
thermal expansion | |
molar heat capacity | |
Specific Heat Capacity | |
heat capacity ratio | |
electrical properties | |
type | Conductor |
electrical conductivity | |
electrical resistivity | |
superconductivity | |
magnetism | |
type | paramagnetic |
magnetic susceptibility (Mass) | 0.0000000325 m³/Kg
|
magnetic susceptibility (Molar) | 0.000000007509 m³/mol
|
magnetic susceptibility (Volume) | 0.0004995
|
magnetic ordering | |
Curie temperature | |
Néel temperature | |
structure | |
Crystal Structure | Centered Tetragonal (TET) |
lattice constant | |
Lattice Angles | π/2, π/2, π/2 |
mechanical property | |
hardness | |
bulk modulus | |
shear modulus | |
Young's modulus | |
Poisson's ratio | |
speed of sound | |
classification | |
Category | Actinides, Actinides |
CAS Group | |
IUPAC Group | |
Glawe Number | 35 |
Mendeleev Number | 18 |
Pettifor Number | 46 |
Geochemical Class | U/Th decay series |
Goldschmidt classification | litophile |
Gas Basicity | |
---|---|
polarizability | |
C6 Dispersion Coefficient | |
allotrope | |
Neutron cross section | 200
|
Neutron Mass Absorption | |
quantum number | 4K11/2 |
space group | 139 (I4/mmm) |
Stable Isotopes | 0 |
---|---|
Unstable Isotopes | 31 |
Natural Isotopes | 1 |
mass number | 211 |
---|---|
neutron number | 120 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 6 ± 3 ms
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 2006 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | |
p (proton emission) |
mass number | 212 |
---|---|
neutron number | 121 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 5.8 ± 1.9 ms
|
spin | 3 |
nuclear quadrupole moment | |
time of discovery or invention | 1997 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 213 |
---|---|
neutron number | 122 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 7.4 ± 2.4 ms
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1995 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 214 |
---|---|
neutron number | 123 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 17 ± 3 ms
|
spin | 7 |
nuclear quadrupole moment | |
time of discovery or invention | 1995 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 215 |
---|---|
neutron number | 124 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 14 ± 2 ms
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1979 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 216 |
---|---|
neutron number | 125 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 105 ± 12 ms
|
spin | 5 |
nuclear quadrupole moment | |
time of discovery or invention | 1972 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 217 |
---|---|
neutron number | 126 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 3.8 ± 0.2 ms
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1968 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β− (β− decay) |
mass number | 218 |
---|---|
neutron number | 127 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 108 ± 5 us
|
spin | 8 |
nuclear quadrupole moment | |
time of discovery or invention | 1979 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 219 |
---|---|
neutron number | 128 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 56 ± 9 ns
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 2005 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 220 |
---|---|
neutron number | 129 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 0.85 ± 0.06 us
|
spin | 1 |
nuclear quadrupole moment | |
time of discovery or invention | 2005 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 221 |
---|---|
neutron number | 130 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 5.9 ± 1.7 us
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1983 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 222 |
---|---|
neutron number | 131 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 3.8 ± 0.2 ms
|
spin | 1 |
nuclear quadrupole moment | |
time of discovery or invention | 1970 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 223 |
---|---|
neutron number | 132 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 5.3 ± 0.3 ms
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1970 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 224 |
---|---|
neutron number | 133 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 844 ± 19 ms
|
spin | 5 |
nuclear quadrupole moment | |
time of discovery or invention | 1958 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 225 |
---|---|
neutron number | 134 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.71 ± 0.1 s
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1958 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
mass number | 226 |
---|---|
neutron number | 135 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.8 ± 0.2 m
|
spin | 1 |
nuclear quadrupole moment | |
time of discovery or invention | 1949 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 74% |
β+ (β+ decay; β+ = ϵ + e+) | 26% |
mass number | 227 |
---|---|
neutron number | 136 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 38.3 ± 0.3 m
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1948 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 85% |
ϵ (electron capture) | 15% |
mass number | 228 |
---|---|
neutron number | 137 |
Relative Atomic Mass | |
g-factor | 1.1666666666667 ± 0.16666666666667
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 22 ± 1 h
|
spin | 3 |
nuclear quadrupole moment | |
time of discovery or invention | 1948 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 98.15% |
α (α emission) | 1.85% |
mass number | 229 |
---|---|
neutron number | 138 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.55 ± 0.04 d
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1949 |
parity | + |
decay mode | intensity |
---|---|
ϵ (electron capture) | 99.51% |
α (α emission) | 0.49% |
mass number | 230 |
---|---|
neutron number | 139 |
Relative Atomic Mass | |
g-factor | 1 ± 0.1
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 17.4 ± 0.5 d
|
spin | 2 |
nuclear quadrupole moment | |
time of discovery or invention | 1948 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 92.2% |
β− (β− decay) | 7.8% |
α (α emission) | 0.0032% |
mass number | 231 |
---|---|
neutron number | 140 |
Relative Atomic Mass | |
g-factor | 1.3266666666667 ± 0.013333333333333
|
natural abundance | 100
|
radioactivity | ☢️ radioactive element |
half-life | 32.65 ± 0.2 ky
|
spin | 3/2 |
nuclear quadrupole moment | -1.72 ± 0.05
|
time of discovery or invention | 1918 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 3% |
24Ne (heavy cluster emission) | 13.4% |
23F | 9.9% |
mass number | 232 |
---|---|
neutron number | 141 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.32 ± 0.02 d
|
spin | 2 |
nuclear quadrupole moment | |
time of discovery or invention | 1949 |
parity | - |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
ϵ (electron capture) |
mass number | 233 |
---|---|
neutron number | 142 |
Relative Atomic Mass | |
g-factor | 2.6666666666667 ± 0.46666666666667
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 26.975 ± 0.013 d
|
spin | 3/2 |
nuclear quadrupole moment | -3 ± 0.4
|
time of discovery or invention | 1938 |
parity | - |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 234 |
---|---|
neutron number | 143 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 6.7 ± 0.05 h
|
spin | 4 |
nuclear quadrupole moment | |
time of discovery or invention | 1913 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 235 |
---|---|
neutron number | 144 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 24.4 ± 0.2 m
|
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1950 |
parity | - |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 236 |
---|---|
neutron number | 145 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 9.1 ± 0.1 m
|
spin | 1 |
nuclear quadrupole moment | |
time of discovery or invention | 1963 |
parity |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− SF (β−-delayed fission) | 6% |
mass number | 237 |
---|---|
neutron number | 146 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 8.7 ± 0.2 m
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1954 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 238 |
---|---|
neutron number | 147 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 2.28 ± 0.09 m
|
spin | 3 |
nuclear quadrupole moment | |
time of discovery or invention | 1968 |
parity | - |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− SF (β−-delayed fission) | 2.6% |
mass number | 239 |
---|---|
neutron number | 148 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.8 ± 0.5 h
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1995 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
mass number | 240 |
---|---|
neutron number | 149 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 3 |
nuclear quadrupole moment | |
time of discovery or invention | |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) |
mass number | 241 |
---|---|
neutron number | 150 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) |
discoverer or inventor | Fredrich Soddy, John Cranston, Otto Hahn, Lise Meitner |
---|---|
location of discovery | England/France |
time of discovery or invention | 1917 |
etymology | Greek: proto and actinium (parent of actinium); it forms actinium when it radioactively decays. |
pronunciation | PRO-tak-tin-eh-em (Ingarihi) |
Abundance | |
---|---|
Abundance in Earth's crust | |
natural abundance (Moana nui) | |
natural abundance (human body) | 0 %
|
natural abundance (meteoroid) | |
natural abundance (Te Rā) | |
Abundance in Universe | 0 %
|