Statements (55)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:isotope
|
| gptkbp:bfsLayer |
6
|
| gptkbp:bfsParent |
gptkb:promethium
|
| gptkbp:application |
research in nuclear science
used in luminescent materials |
| gptkbp:availability |
limited availability
|
| gptkbp:block |
f-block
|
| gptkbp:class |
rare earth elements
|
| gptkbp:color |
silvery-white
|
| gptkbp:composed_of |
reacts with oxygen
synthesized from neodymium |
| gptkbp:cooling_system |
12.5 W/(m· K)
|
| gptkbp:discovered_by |
gptkb:Glenn_T._Seaborg
|
| gptkbp:dissolved |
soluble in acids
|
| gptkbp:electronegativity |
1.1 (Pauling scale)
[ Xe] 6s2 4f5 |
| gptkbp:environmental_impact |
low due to rarity
|
| gptkbp:field_of_study |
nuclear chemistry
|
| gptkbp:financial_performance |
unstable
|
| gptkbp:fuel_type |
not used as nuclear fuel
|
| gptkbp:historical_period |
gptkb:6
|
| gptkbp:historical_significance |
first non-primordial element isolated
|
| https://www.w3.org/2000/01/rdf-schema#label |
Pm-139
|
| gptkbp:isotopes |
gptkb:theorem
61 78 beta-emitting isotope has no stable isotopes ionizes in the presence of air |
| gptkbp:lifespan |
2.5 days
|
| gptkbp:market |
limited market due to radioactivity
|
| gptkbp:mass |
139
|
| gptkbp:material |
used in some metal alloys
|
| gptkbp:melting_point |
1040 ° C
3000 ° C |
| gptkbp:members |
lanthanides
|
| gptkbp:mode |
gptkb:beta_decay
|
| gptkbp:occurs_in |
synthetic
|
| gptkbp:parent |
Sm-139
|
| gptkbp:population |
7.26 g/cm³
|
| gptkbp:power_output |
5.576 e V
|
| gptkbp:produced_by |
produced in nuclear reactors
|
| gptkbp:research |
used in spectroscopic studies
|
| gptkbp:roll_rate |
5/2+
|
| gptkbp:safety_features |
radioactive precautions required
requires MSDS for handling |
| gptkbp:social_structure |
hexagonal
+3, +2 |
| gptkbp:symbol |
Pm
|
| gptkbp:uses |
nuclear batteries
|
| gptkbp:was_a_response_to |
reacts with halogens
can be produced by neutron capture similar to other lanthanides |
| gptkbp:water_management |
requires special handling
|
| gptkbp:year_created |
1945
|