Atomic Number | 96 |
---|---|
Atomic Weight | 247 |
Mass Number | 231 |
Group | |
---|---|
Period | 7 |
Block | f |
Protons | 96 p+ |
---|---|
Neutrons | 135 n0 |
Electrons | 96 e- |
Physical Properties | |
---|---|
Atomic Radius | |
Molar Volume | 18.28 cm³/mol
|
Covalent Radius | 166 pm
|
Metallic Radius | |
Ionic Radius | 97 pm
|
Crystal Radius | 111 pm
|
Van der Waals Radius |
245 pm
|
Density | 13.51 g/cm³
|
Energy | |
Proton Affinity | |
Electron Affinity | |
Ionization Energy | 5.9914 eV/particle
|
Heat of Vaporization | |
Heat of Fusion | |
Heat of Formation | 386 kJ/mol
|
Electrons | |
Electron Shells | 2, 8, 18, 32, 25, 9, 2 |
Valence Electrons | 2 |
Electron Configuration | [Rn] 5f7 6d1 7s2 |
Oxidation States | 3, 4, 5, 6 |
Electronegativity | |
Electrophilicity | |
Phases | |
Phase | Solid |
Gas Phase | |
Boiling Point | |
Melting Point | 1,618.15 K
|
Critical Pressure | |
Critical Temperature | |
Triple Point | |
Visual | |
Curium is a Silver. Cm has a CPK of #ffffff, Jmol of #785ce3, and MOLCAS GV of #785ce3. The Appearance of Element 96 is silvery metallic, glows purple in the dark. | |
Color | Silver
|
Appearance | silvery metallic, glows purple in the dark |
Refractive Index | |
Thermodynamic Properties | |
Thermal Conductivity | |
Thermal Expansion | |
Molar Heat Capacity | |
Specific Heat Capacity | |
Heat Capacity Ratio (Adiabatic Index) | |
Electrical Properties | |
Type | |
Electrical Conductivity | |
Electrical Resistivity | |
Superconducting Point | |
Magnetism | |
Type | |
Magnetic Susceptibility (Mass) | |
Magnetic Susceptibility (Molar) | |
Magnetic Susceptibility (Volume) | |
Magnetic Ordering | |
Curie Point | |
Neel Point | |
Structure | |
The lattice angles of Curium are π/2, π/2, 2 π/3. | |
Crystal Structure | Simple Hexagonal () |
Lattice Constant | |
Lattice Angles | π/2, π/2, 2 π/3 |
Mechanical Properties | |
Hardness | |
Bulk Modulus | |
Shear Modulus | |
Young Modulus | |
Poisson Ratio | |
Speed of Sound | |
Classification | |
The Glawe Number of Curium is 40. The Mendeleev Number of Cm is 28. The Pettifor Number of Element 96 is 41. The Goldschmidt Class of Curium (Cm) is synthetic. | |
Category | Actinides, Actinides |
CAS Group | |
IUPAC Group | |
Glawe Number | 40 |
Mendeleev Number | 28 |
Pettifor Number | 41 |
Geochemical Class | |
Goldschmidt Class | synthetic |
Other | |
The Dipole Polarizability of Curium is 144 plus or minus 25 a₀. The Allotropes of Cm is . The Neutron Cross Section of Element 96 is 60. The Quantum Numbers of Curium (Cm) is 9D2. The Space Group of Curium is 194 (P63/mmc). | |
Gas Basicity | |
Dipole Polarizability | |
C6 Dispersion Coefficient | |
Allotropes | |
Neutron Cross Section | 60
|
Neutron Mass Absorption | |
Quantum Numbers | 9D2 |
Space Group | 194 (P63/mmc) |
Stable Isotopes | 0 |
---|---|
Unstable Isotopes | 22 |
Radioactive Isotopes | 22 |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 231 |
G-Factor | |
Half Life | |
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | % |
α (α emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 232 |
G-Factor | 0
|
Half Life | |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | % |
α (α emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 233 |
G-Factor | |
Half Life | 27 ± 10 s
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 2001 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 20% |
β+ (β+ decay; β+ = ϵ + e+) | 80% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 234 |
G-Factor | 0
|
Half Life | 52 ± 9 s
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 2001 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 71% |
α (α emission) | 27% |
SF (spontaneous fission) | 2% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 235 |
G-Factor | |
Half Life | 7 ± 3 m
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1981 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | % |
α (α emission) | 4% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 236 |
G-Factor | 0
|
Half Life | 6.8 ± 0.8 m
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 2010 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 82% |
α (α emission) | 18% |
SF (spontaneous fission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 237 |
G-Factor | |
Half Life | |
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 2002 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | % |
α (α emission) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 238 |
G-Factor | 0
|
Half Life | 2.2 ± 0.4 h
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1994 |
Parity | + |
Decay Mode | Intensity |
---|---|
ϵ (electron capture) | % |
α (α emission) | 3.84% |
SF (spontaneous fission) | 0.048% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 239 |
G-Factor | |
Half Life | 2.5 ± 0.4 h
|
Spin | 7/2 |
Quadrupole Moment | |
Discovery Year | 1952 |
Parity | - |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
α (α emission) | 6.2% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 240 |
G-Factor | 0
|
Half Life | 30.4 ± 3.7 d
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1949 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
ϵ (electron capture) | % |
SF (spontaneous fission) | 3.9% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 241 |
G-Factor | |
Half Life | 32.8 ± 0.2 d
|
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | 1952 |
Parity | + |
Decay Mode | Intensity |
---|---|
ϵ (electron capture) | 99% |
α (α emission) | 1% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 242 |
G-Factor | 0
|
Half Life | 162.8 ± 0.2 d
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1949 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 6.2% |
34Si | 1.1% |
2β+ (double β+ decay) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 243 |
G-Factor | 0.16 ± 0.032
|
Half Life | 29.1 ± 0.1 y
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1950 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
ϵ (electron capture) | 0.29% |
SF (spontaneous fission) | 5.3% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 244 |
G-Factor | 0
|
Half Life | 18.11 ± 0.03 y
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1950 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 1.37% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 245 |
G-Factor | 0.14285714285714 ± 0.028571428571429
|
Half Life | 8.25 ± 0.07 ky
|
Spin | 7/2 |
Quadrupole Moment | |
Discovery Year | 1954 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
SF (spontaneous fission) | 6.1% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 246 |
G-Factor | 0
|
Half Life | 4.706 ± 0.04 ky
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1954 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 99.97385% |
SF (spontaneous fission) | 0.02615% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 247 |
G-Factor | 0.08 ± 0.015555555555556
|
Half Life | 15.6 ± 0.5 My
|
Spin | 9/2 |
Quadrupole Moment | |
Discovery Year | 1954 |
Parity | - |
Decay Mode | Intensity |
---|---|
α (α emission) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 248 |
G-Factor | 0
|
Half Life | 348 ± 6 ky
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1956 |
Parity | + |
Decay Mode | Intensity |
---|---|
α (α emission) | 91.61% |
SF (spontaneous fission) | 8.39% |
2β− (double β− decay) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 249 |
G-Factor | |
Half Life | 64.15 ± 0.03 m
|
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | 1956 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 250 |
G-Factor | 0
|
Half Life | |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1966 |
Parity | + |
Decay Mode | Intensity |
---|---|
SF (spontaneous fission) | 74% |
α (α emission) | % |
β− (β− decay) | % |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 251 |
G-Factor | |
Half Life | 16.8 ± 0.2 m
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1978 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Abundance | Radioactive ☢️ |
---|---|
Relative Atomic Mass | |
Mass Number | 252 |
G-Factor | 0
|
Half Life | |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | % |
α (α emission) | % |
Curium was discovered by Glenn T. Seaborg, Ralph A. James and Albert Ghiorso in 1944 at the University of California, Berkeley. It was produced by bombarding plutonium with alpha particles during the Manhattan Project. Curium metal was produced only in 1951 by reduction of curium fluoride with barium. Curium is named after Madame Curie and her husband Pierre Curie
Discoverers | G.T.Seaborg, R.A.James, A.Ghiorso |
---|---|
Discovery Location | United States |
Discovery Year | 1944 |
Etymology (Name Origin) | Named in honor of Pierre and Marie Curie. |
Pronunciation | KYOOR-i-em (English) |
Made by bombarding plutonium with helium ions. So radioactive it glows in the dark.
Abundance | |
---|---|
Abundance in Earth's crust | |
Abundance in Oceans | |
Abundance in Human Body | 0 %
|
Abundance in Meteor | 0 %
|
Abundance in Sun | 0 %
|
Abundance in Universe | 0 %
|