Radium
88
Ra
Groep
2
Periode
7
Blok
s
Protrone
Elektrone
Neutrone
88
88
138
Algemene Eienskappe
Atoom Nommer
88
Atoommassa
[226]
Massa Nommer
226
Kategorie
Aardalkalimetale
Kleur
Silver
Radioaktief
Ja
From the Latin word radius meaning ray
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
Radium was discovered by Marie Curie and Pierre Curie in 1898.
They extracted the radium compound from a uraninite sample.
Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne in 1910 through the electrolysis of radium chloride by using a mercury cathode and distilling in an atmosphere of hydrogen gas.
They extracted the radium compound from a uraninite sample.
Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne in 1910 through the electrolysis of radium chloride by using a mercury cathode and distilling in an atmosphere of hydrogen gas.
Elektrone per skil
2, 8, 18, 32, 18, 8, 2
Elektronkonfigurasie
[Rn] 7s2
Radium imparts a carmine red color to a flame
Fisiese Eienskappe
Fase
Soliede
Digtheid
5,5 g/cm3
Smeltpunt
973,15 K | 700 °C | 1292 °F
Kookpunt
2010,15 K | 1737 °C | 3158,6 °F
Heat of Fusion
8 kJ/mol
Heat of Vaporization
125 kJ/mol
Spesifieke Hitte Kapasiteit
-
Oorvloed in die aardkors
9,9×10-12%
Oorvloed in die heelal
n/a
CAS Nommer
7440-14-4
PubChem CID Nommer
6328144
Atomiese Eienskappe
Atoom radius
-
Kovalente Radius
221 pm
Elektronegatiewiteit
0,9 (Pauling scale)
Ionisasie potensiaal
5,2784 eV
Atoom volume
45,20 cm3/mol
Termiese geleidingsvermoë
0,186 W/cm·K
Oksidasiestate
2
Toepassings
Radium was formerly used in self-luminous paints for watches, nuclear panels, aircraft switches, clocks, and instrument dials.
Radium chloride was used in medicine to produce radon gas which in turn was used as a cancer treatment.
The isotope 223Ra is currently under investigation for use in medicine as a cancer treatment of bone metastasis.
Radium chloride was used in medicine to produce radon gas which in turn was used as a cancer treatment.
The isotope 223Ra is currently under investigation for use in medicine as a cancer treatment of bone metastasis.
Radium is highly radioactive and carcinogenic
Isotope
Stabiele Isotope
-Onstabiele Isotope
202Ra, 203Ra, 204Ra, 205Ra, 206Ra, 207Ra, 208Ra, 209Ra, 210Ra, 211Ra, 212Ra, 213Ra, 214Ra, 215Ra, 216Ra, 217Ra, 218Ra, 219Ra, 220Ra, 221Ra, 222Ra, 223Ra, 224Ra, 225Ra, 226Ra, 227Ra, 228Ra, 229Ra, 230Ra, 231Ra, 232Ra, 233Ra, 234Ra