|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:affiliatedWith
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
silvery white metal
|
|
gptkbp:atomicNumber
|
88
|
|
gptkbp:block
|
s-block
|
|
gptkbp:boilingPoint
|
1737 °C
|
|
gptkbp:CASNumber
|
7440-14-4
|
|
gptkbp:category
|
gptkb:alkaline_earth_metals
radioactive elements
|
|
gptkbp:crystalSystem
|
body-centered cubic
|
|
gptkbp:decaysTo
|
radon
|
|
gptkbp:density
|
5.5 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Marie_Curie
gptkb:Pierre_Curie
|
|
gptkbp:discoveredIn
|
gptkb:France
1898
|
|
gptkbp:electronConfiguration
|
[Rn] 7s2
|
|
gptkbp:electronegativity
|
0.9 (Pauling scale)
|
|
gptkbp:emits
|
gptkb:gamma_rays
alpha particles
|
|
gptkbp:firstIonizationEnergy
|
509.3 kJ/mol
|
|
gptkbp:foundIn
|
uranium ores
|
|
gptkbp:halfLifeOfRa-226
|
1600 years
|
|
gptkbp:historicalName
|
gptkb:radium_clocks
radium girls (factory workers)
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Radium
|
|
gptkbp:isotopes
|
gptkb:Ra-224
gptkb:Ra-226
gptkb:Ra-228
|
|
gptkbp:massNumber
|
226 u
|
|
gptkbp:meltingPoint
|
700 °C
|
|
gptkbp:molarHeatCapacity
|
0.12 J/(g·K)
|
|
gptkbp:mostStableIsotope
|
gptkb:Ra-226
|
|
gptkbp:namedAfter
|
radius (Latin for ray)
|
|
gptkbp:oxidationStates
|
+2
|
|
gptkbp:partOfSeries
|
gptkb:radium_series_(uranium_decay_chain)
|
|
gptkbp:period
|
7
|
|
gptkbp:radioactive
|
true
|
|
gptkbp:relatedGroup
|
alkaline earth metal
|
|
gptkbp:riskFactor
|
highly radioactive
carcinogenic
|
|
gptkbp:stateAtRoomTemperature
|
gptkb:stone
|
|
gptkbp:storage
|
under oil or inert atmosphere
|
|
gptkbp:symbol
|
gptkb:Ra
|
|
gptkbp:thermalConductivity
|
18.6 W/(m·K)
|
|
gptkbp:type
|
gptkb:water
gptkb:halogens
oxygen
|
|
gptkbp:uses
|
luminous paints (historically)
medical radiation therapy
|
|
gptkbp:bfsParent
|
gptkb:Vanilla_Ice
gptkb:Something_Awful_forums
|
|
gptkbp:bfsLayer
|
6
|