Atomic Number | 100 |
---|---|
Atomic Weight | 257 |
mass number | 241 |
Group | |
---|---|
Period | 7 |
Block | f |
proton | 100 p+ |
---|---|
neutron | 141 n0 |
electron | 100 e- |
energy | |
---|---|
proton affinity | |
electron affinity | |
ionization energy | |
enthalpy of vaporization | |
enthalpy of fusion | |
standard enthalpy of formation | |
electron | |
electron shell | 2, 8, 18, 32, 30, 8, 2 |
valence electron | 2 ⓘ |
electron configuration | [Rn] 5f12 7s2ⓘ 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f12 7s2 |
oxidation number | 2, 3 |
electronegativity | |
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 | Colorless
|
appearance | |
refractive index | |
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 | |
magnetic susceptibility (Mass) | |
magnetic susceptibility (Molar) | |
magnetic susceptibility (Volume) | |
magnetic ordering | |
Curie temperature | |
Néel temperature | |
structure | |
Crystal Structure | () |
lattice constant | |
Lattice Angles | |
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 | 44 |
Mendeleev Number | 36 |
Pettifor Number | 37 |
Geochemical Class | |
Goldschmidt classification | synthetic |
Gas Basicity | |
---|---|
polarizability | |
C6 Dispersion Coefficient | |
allotrope | |
Neutron cross section | 5,800
|
Neutron Mass Absorption | |
quantum number | 3H6 |
space group | () |
Stable Isotopes | 0 |
---|---|
Unstable Isotopes | 20 |
Natural Isotopes | 0 |
mass number | 241 |
---|---|
neutron number | 141 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 730 ± 60 us
|
spin | 5/2 |
nuclear quadrupole moment | |
time of discovery or invention | 2008 |
parity | + |
decay mode | intensity |
---|---|
SF (spontaneous fission) | |
α (α emission) | 14% |
β+ (β+ decay; β+ = ϵ + e+) | 12% |
mass number | 242 |
---|---|
neutron number | 142 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 800 ± 200 us
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1975 |
parity | + |
decay mode | intensity |
---|---|
SF (spontaneous fission) | 100% |
α (α emission) |
mass number | 243 |
---|---|
neutron number | 143 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 231 ± 9 ms
|
spin | 7/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1981 |
parity | - |
decay mode | intensity |
---|---|
α (α emission) | 91% |
SF (spontaneous fission) | 9% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 244 |
---|---|
neutron number | 144 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 3.12 ± 0.08 ms
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1967 |
parity | + |
decay mode | intensity |
---|---|
SF (spontaneous fission) | 97% |
β+ (β+ decay; β+ = ϵ + e+) | 2% |
α (α emission) | 1% |
mass number | 245 |
---|---|
neutron number | 145 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 4.2 ± 1.3 s
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1967 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | 7% |
SF (spontaneous fission) | 0.3% |
mass number | 246 |
---|---|
neutron number | 146 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.54 ± 0.04 s
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1966 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 93.2% |
SF (spontaneous fission) | 6.8% |
ϵ (electron capture) | 1.3% |
mass number | 247 |
---|---|
neutron number | 147 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 31 ± 1 s
|
spin | 7/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1967 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 64% |
β+ (β+ decay; β+ = ϵ + e+) |
mass number | 248 |
---|---|
neutron number | 148 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 34.5 ± 1.2 s
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1958 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
β+ (β+ decay; β+ = ϵ + e+) | |
SF (spontaneous fission) | 0.1% |
mass number | 249 |
---|---|
neutron number | 149 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.6 ± 0.1 m
|
spin | 7/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1960 |
parity | + |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | |
α (α emission) | 33% |
mass number | 250 |
---|---|
neutron number | 150 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 31 ± 1.1 m
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1954 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 0.0069% |
ϵ (electron capture) |
mass number | 251 |
---|---|
neutron number | 151 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 5.3 ± 0.08 h
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1957 |
parity | - |
decay mode | intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 98.2% |
α (α emission) | 1.8% |
mass number | 252 |
---|---|
neutron number | 152 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 25.39 ± 0.04 h
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1956 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 0.0023% |
2β+ (double β+ decay) |
mass number | 253 |
---|---|
neutron number | 153 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 3 ± 0.12 d
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1957 |
parity | + |
decay mode | intensity |
---|---|
ϵ (electron capture) | 88% |
α (α emission) | 12% |
mass number | 254 |
---|---|
neutron number | 154 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 3.24 ± 0.002 h
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1954 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 99.9408% |
SF (spontaneous fission) | 0.0592% |
mass number | 255 |
---|---|
neutron number | 155 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 20.07 ± 0.07 h
|
spin | 7/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1954 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 2.4% |
mass number | 256 |
---|---|
neutron number | 156 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 157.1 ± 1.3 m
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1955 |
parity | + |
decay mode | intensity |
---|---|
SF (spontaneous fission) | 91.9% |
α (α emission) | 8.1% |
mass number | 257 |
---|---|
neutron number | 157 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 100.5 ± 0.2 d
|
spin | 9/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1964 |
parity | + |
decay mode | intensity |
---|---|
α (α emission) | 99.79% |
SF (spontaneous fission) | 0.21% |
mass number | 258 |
---|---|
neutron number | 158 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 370 ± 14 us
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1971 |
parity | + |
decay mode | intensity |
---|---|
SF (spontaneous fission) | 100% |
α (α emission) |
mass number | 259 |
---|---|
neutron number | 159 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 1.5 ± 0.2 s
|
spin | |
nuclear quadrupole moment | |
time of discovery or invention | 1980 |
parity |
decay mode | intensity |
---|---|
SF (spontaneous fission) | 100% |
mass number | 260 |
---|---|
neutron number | 160 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | |
parity | + |
decay mode | intensity |
---|---|
SF (spontaneous fission) |
discoverer or inventor | Argonne, Los Alamos, U of Calif |
---|---|
location of discovery | United States |
time of discovery or invention | 1953 |
etymology | Named in honor of the scientist Enrico Fermi. |
pronunciation | FER-mi-em (Ingarihi) |
Abundance | |
---|---|
Abundance in Earth's crust | |
natural abundance (Moana nui) | |
natural abundance (human body) | 0 %
|
natural abundance (meteoroid) | 0 %
|
natural abundance (Te Rā) | 0 %
|
Abundance in Universe | 0 %
|