curium
E909378
Curium is a synthetic, highly radioactive metallic element in the actinide series, used mainly in scientific research and as a source of alpha particles.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Curium | 1 |
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
actinide
ⓘ
chemical element ⓘ radioactive element ⓘ synthetic element ⓘ |
| appearance | silvery metallic solid ⓘ |
| atomicNumber | 96 ⓘ |
| boilingPoint | 3110 °C (approximate) ⓘ |
| CASNumber | 7440-51-9 ⓘ |
| commonOxidationState | +3 ⓘ |
| compound |
curium(III) chloride (CmCl3)
NERFINISHED
ⓘ
curium(III) oxide (Cm2O3) ⓘ curium(IV) oxide (CmO2) ⓘ |
| crystalStructure | double hexagonal close-packed (dhcp) at room temperature ⓘ |
| density | about 13.5 g/cm³ at room temperature ⓘ |
| discoveredBy |
Albert Ghiorso
NERFINISHED
ⓘ
Glenn T. Seaborg NERFINISHED ⓘ Ralph A. James NERFINISHED ⓘ |
| discoveryPlace | University of California, Berkeley NERFINISHED ⓘ |
| discoveryYear | 1944 ⓘ |
| electronicConfiguration | [Rn] 5f7 6d1 7s2 ⓘ |
| group | actinides ⓘ |
| halfLife |
curium-244: about 18.1 years
ⓘ
curium-247: about 15.6 million years ⓘ |
| hazard |
high radiotoxicity
ⓘ
strong alpha emitter requiring shielding ⓘ |
| isotopes |
curium-242
NERFINISHED
ⓘ
curium-244 NERFINISHED ⓘ curium-245 NERFINISHED ⓘ curium-246 NERFINISHED ⓘ curium-247 NERFINISHED ⓘ |
| meltingPoint | 1340 °C ⓘ |
| mostCommonResearchIsotope | curium-244 NERFINISHED ⓘ |
| namedAfter |
Marie Curie
NERFINISHED
ⓘ
Pierre Curie NERFINISHED ⓘ |
| notableProperty | no stable isotopes ⓘ |
| occurrence | synthetic; not found in nature in significant quantities ⓘ |
| oxidationState |
+3
ⓘ
+4 ⓘ |
| positionInPeriodicTable |
actinide series
ⓘ
f-block ⓘ period 7 ⓘ |
| productionMethod |
multiple neutron capture and beta decay of lighter actinides
ⓘ
neutron irradiation of plutonium in nuclear reactors ⓘ |
| radioactiveDecayMode | alpha decay (for many isotopes) ⓘ |
| radioactivity | highly radioactive ⓘ |
| standardAtomicWeight | (247) ⓘ |
| symbol | Cm ⓘ |
| use |
radioisotope power sources (limited, experimental)
ⓘ
scientific research ⓘ source of alpha particles ⓘ target material for synthesis of heavier transuranium elements ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.