| Atomic Number | 94 |
|---|---|
| Atomic Weight | 244 |
| Rhif màs | 221 |
| Group | |
|---|---|
| Period | 7 |
| Block | f |
| Proton | 94 p+ |
|---|---|
| Niwtron | 127 n0 |
| Electron | 94 e- |
| Atomic Radius | |
|---|---|
| molar volume | |
| covalent radius | |
| Metallic Radius | |
| ionic radius | |
| Crystal Radius | |
| Van der Waals radius | |
| density |
| egni | |
|---|---|
| proton affinity | |
| electron affinity | |
| ionization energy | |
| enthalpy of vaporization | |
| enthalpy of fusion | |
| standard enthalpy of formation | |
| Electron | |
| plisgyn yr electron | 2, 8, 18, 32, 24, 8, 2 |
| valence electron | 2 ⓘ |
| trefn yr electronnau | [Rn] 5f6 7s2ⓘ 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f6 7s2 |
| Cyflwr ocsidiad | 2, 3, 4, 5, 6, 7, 8 |
| Electronegatifedd |
1.3
|
| Electrophilicity Index | |
| cyflwr sylfaenol mater | |
| cyflwr mater | {ERROR}|
| gaseous state of matter | |
| Boiling Point | |
| Melting Point | |
| critical pressure | |
| critical temperature | |
| triple point | |
| appearance | |
| lliw | Black
|
| appearance | silvery white, tarnishing to dark gray in air |
| Mynegrif plygiant | |
| nodwedd ffisegol gwrthrych | |
| Thermal Conductivity | |
| thermal expansion | |
| molar heat capacity | |
| Specific Heat Capacity | |
| heat capacity ratio | |
| electrical properties | |
| type | Conductor |
| dargludedd trydanol | |
| Gwrthedd | |
| superconductivity | |
| magnetism | |
| type | paramagnetic |
| magnetic susceptibility (Mass) | 0.0000000317 m³/Kg
|
| magnetic susceptibility (Molar) | 0.000000007735 m³/mol
|
| magnetic susceptibility (Volume) | 0.0006282
|
| magnetic ordering | |
| Curie temperature | |
| Néel temperature | |
| strwythur | |
| Crystal Structure | {ERROR} |
| lattice constant | |
| Lattice Angles | π/2, 1.776571, π/2 |
| nodwedd mecanyddol deunyddiau | |
| hardness | |
| bulk modulus | |
| shear modulus | |
| Young's modulus | |
| Poisson's ratio | 0.21
|
| speed of sound | |
| classification | |
| Category | Actinides, Actinides |
| CAS Group | |
| IUPAC Group | |
| Glawe Number | 38 |
| Mendeleev Number | 24 |
| Pettifor Number | 43 |
| Geochemical Class | |
| Goldschmidt classification | synthetic |
| Gas Basicity | |
|---|---|
| polarizability | |
| C6 Dispersion Coefficient | |
| allotrope | |
| Neutron cross section | 1.7
|
| Neutron Mass Absorption | |
| quantum number | 7F0 |
| space group | 11 (P121/m1) |
| Stable Isotopes | 0 |
|---|---|
| Unstable Isotopes | 27 |
| Natural Isotopes | 0 |
| Rhif màs | 221 |
|---|---|
| neutron number | 127 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 9/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | |
| SF (spontaneous fission) |
| Rhif màs | 222 |
|---|---|
| neutron number | 128 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | |
| SF (spontaneous fission) |
| Rhif màs | 223 |
|---|---|
| neutron number | 129 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 9/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | |
| SF (spontaneous fission) |
| Rhif màs | 224 |
|---|---|
| neutron number | 130 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | |
| SF (spontaneous fission) |
| Rhif màs | 225 |
|---|---|
| neutron number | 131 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 7/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | |
| SF (spontaneous fission) |
| Rhif màs | 226 |
|---|---|
| neutron number | 132 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | |
| SF (spontaneous fission) |
| Rhif màs | 227 |
|---|---|
| neutron number | 133 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | |
| spin | 5/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) |
| Rhif màs | 228 |
|---|---|
| neutron number | 134 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 2.1 ± 1.3 s
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1994 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| β+ (β+ decay; β+ = ϵ + e+) |
| Rhif màs | 229 |
|---|---|
| neutron number | 135 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 91 ± 26 s
|
| spin | 3/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1994 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 50% |
| β+ (β+ decay; β+ = ϵ + e+) | 50% |
| SF (spontaneous fission) | 7% |
| Rhif màs | 230 |
|---|---|
| neutron number | 136 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 105 ± 10 s
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1990 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| β+ (β+ decay; β+ = ϵ + e+) |
| Rhif màs | 231 |
|---|---|
| neutron number | 137 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 8.6 ± 0.5 m
|
| spin | 3/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1999 |
| parity | + |
| decay mode | intensity |
|---|---|
| β+ (β+ decay; β+ = ϵ + e+) | |
| α (α emission) | 13% |
| Rhif màs | 232 |
|---|---|
| neutron number | 138 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 33.7 ± 0.5 m
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1973 |
| parity | + |
| decay mode | intensity |
|---|---|
| ϵ (electron capture) | |
| α (α emission) | 20% |
| Rhif màs | 233 |
|---|---|
| neutron number | 139 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 20.9 ± 0.4 m
|
| spin | 5/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1957 |
| parity | + |
| decay mode | intensity |
|---|---|
| β+ (β+ decay; β+ = ϵ + e+) | 100% |
| α (α emission) | 0.12% |
| Rhif màs | 234 |
|---|---|
| neutron number | 140 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 8.8 ± 0.1 h
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1949 |
| parity | + |
| decay mode | intensity |
|---|---|
| ϵ (electron capture) | 94% |
| α (α emission) | 6% |
| Rhif màs | 235 |
|---|---|
| neutron number | 141 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 25.3 ± 0.5 m
|
| spin | 5/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1957 |
| parity | + |
| decay mode | intensity |
|---|---|
| β+ (β+ decay; β+ = ϵ + e+) | 99.9972% |
| α (α emission) | 0.0028% |
| Rhif màs | 236 |
|---|---|
| neutron number | 142 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 2.858 ± 0.008 y
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1949 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| SF (spontaneous fission) | 1.9% |
| 28Mg | 2% |
| 2β+ (double β+ decay) |
| Rhif màs | 237 |
|---|---|
| neutron number | 143 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 45.64 ± 0.04 d
|
| spin | 7/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1949 |
| parity | - |
| decay mode | intensity |
|---|---|
| ϵ (electron capture) | 99.9958% |
| α (α emission) | 0.0042% |
| Rhif màs | 238 |
|---|---|
| neutron number | 144 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 87.7 ± 0.1 y
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1949 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| SF (spontaneous fission) | 1.9% |
| 32Si | 1.4% |
| 30Mg | 6% |
| Rhif màs | 239 |
|---|---|
| neutron number | 145 |
| Relative Atomic Mass | |
| g-factor | 0.404 ± 0.008
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 24.11 ± 0.03 ky
|
| spin | 1/2 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1946 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| SF (spontaneous fission) | 3.1% |
| Rhif màs | 240 |
|---|---|
| neutron number | 146 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 6.561 ± 0.007 ky
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1949 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| SF (spontaneous fission) | 5.796% |
| 34Si | 1.3% |
| Rhif màs | 241 |
|---|---|
| neutron number | 147 |
| Relative Atomic Mass | |
| g-factor | -0.2712 ± 0.0056
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 14.329 ± 0.029 y
|
| spin | 5/2 |
| nuclear quadrupole moment | 6
|
| dyddiad darganfod | 1949 |
| parity | + |
| decay mode | intensity |
|---|---|
| β− (β− decay) | 100% |
| α (α emission) | 0.00245% |
| SF (spontaneous fission) | 2.4% |
| Rhif màs | 242 |
|---|---|
| neutron number | 148 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 375 ± 2 ky
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1950 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 100% |
| SF (spontaneous fission) | 5.51% |
| Rhif màs | 243 |
|---|---|
| neutron number | 149 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 4.9553 ± 0.0025 h
|
| spin | 7/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1951 |
| parity | + |
| decay mode | intensity |
|---|---|
| β− (β− decay) | 100% |
| Rhif màs | 244 |
|---|---|
| neutron number | 150 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 81.3 ± 0.3 My
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1954 |
| parity | + |
| decay mode | intensity |
|---|---|
| α (α emission) | 99.877% |
| SF (spontaneous fission) | 0.123% |
| 2β− (double β− decay) | 7.3% |
| Rhif màs | 245 |
|---|---|
| neutron number | 151 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 10.5 ± 0.1 h
|
| spin | 9/2 |
| nuclear quadrupole moment | |
| dyddiad darganfod | 1955 |
| parity | - |
| decay mode | intensity |
|---|---|
| β− (β− decay) | 100% |
| Rhif màs | 246 |
|---|---|
| neutron number | 152 |
| Relative Atomic Mass | |
| g-factor | 0
|
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 10.84 ± 0.02 d
|
| spin | 0 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1955 |
| parity | + |
| decay mode | intensity |
|---|---|
| β− (β− decay) | 100% |
| Rhif màs | 247 |
|---|---|
| neutron number | 153 |
| Relative Atomic Mass | |
| g-factor | |
| natural abundance | |
| Dadfeilio ymbelydrol | ☢️ elfen ymbelydrol |
| Hanner oes | 2.27 ± 0.23 d
|
| spin | 1/2 |
| nuclear quadrupole moment | 0
|
| dyddiad darganfod | 1983 |
| parity | + |
| decay mode | intensity |
|---|---|
| β− (β− decay) | 100% |
| darganfyddwr neu ddyfeisiwr | G.T.Seaborg, J.W.Kennedy, E.M.McMillan, A.C.Wohl |
|---|---|
| man darganfod | United States |
| dyddiad darganfod | 1940 |
| geirdarddiad | Named for the planet Pluto. |
| ynganiad | ploo-TOE-ni-em (Saesneg) |
| Abundance | |
|---|---|
| Abundance in Earth's crust | |
| natural abundance (cefnfor) | |
| natural abundance (corff dynol) | 0 %
|
| natural abundance (Awyrfaen) | 0 %
|
| natural abundance (Haul) | 0 %
|
| Abundance in Universe | 0 %
|