Radium

Radium (Ra)

chemical element with the atomic number of 88
Atomic Number88
Atomic Weight226
Massagetal201
Group2
Period7
Blocks
proton88 p+
neutron113 n0
elektron88 e-
Animated Bohr model of Ra (Radium)

Physical Property

Atoomradius
215 pm
molar volume
Covalent Radius
201 pm
Metallic Radius
Ioonradius
148 pm
Crystal Radius
162 pm
Van der Waals radius
283 pm
density
Atomic Radii Of The Elements: Radium020406080100120140160180200220240260280300pmAtoomradiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
electron affinity
ionization energy
5,278424 eV/particle
ionization energy of Ra (Radium)
Verdampingswarmte
113 kJ/mol
smeltingswarmte
9,6 kJ/mol
Vormingsentalpie
159 kJ/mol
elektron
Elektronskil2, 8, 18, 32, 18, 8, 2
Bohr model: Ra (Radium)
Valenselektrone2
Lewisteorie: Ra (Radium)
elektronkonfigurasie[Rn] 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2
Enhanced Bohr model of Ra (Radium)
Orbital Diagram of Ra (Radium)
Oksidasietoestand2
Elektronegatiwiteit
0.9
Electrophilicity Index
0,6982685447294388 eV/particle
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
969,15 K
critical pressure
critical temperature
triple point
appearance
kleur
Silver
appearancesilvery white metallic
Brekingsindeks
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
Geleidingsvermoë
1 MS/m
Elektriese resistiwiteit
0,000001 m Ω
superconductivity
Magnetisme
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal StructureBody Centered Cubic ()
lattice constant
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
classification
CategoryAlkaline earth metals, Alkaline earth metals
CAS GroupIIA
IUPAC GroupIIA
Glawe Number13
Mendeleev Number10
Pettifor Number13
Geochemical ClassU/Th decay series
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
246 ± 4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
13
Neutron Mass Absorption
quantum number1S0
Ruimtegroep229 (Im_3m)

Isotopes of Radium

Stable Isotopes0
Unstable Isotopes35
Natural Isotopes0

201Ra

Massagetal201
neutron number113
relative atomic mass
201,012814699 ± 0,000021794 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
20 ± 30 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum2005
parity-

decay modeintensity
α (α emission)100%

202Ra

Massagetal202
neutron number114
relative atomic mass
202,009742305 ± 0,000016122 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4,1 ± 1,1 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2005
parity+

decay modeintensity
α (α emission)100%

203Ra

Massagetal203
neutron number115
relative atomic mass
203,009233907 ± 0,0000104 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
36 ± 13 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1996
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

204Ra

Massagetal204
neutron number116
relative atomic mass
204,006506855 ± 0,00000958 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
60 ± 9 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1995
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

205Ra

Massagetal205
neutron number117
relative atomic mass
205,006230692 ± 0,000024446 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
220 ± 50 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1987
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

206Ra

Massagetal206
neutron number118
relative atomic mass
206,003827842 ± 0,000019332 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
240 ± 20 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

207Ra

Massagetal207
neutron number119
relative atomic mass
207,00377242 ± 0,000062572 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,38 ± 0,18 s
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1967
parity-

decay modeintensity
α (α emission)86%
β+ (β+ decay; β+ = ϵ + e+)

208Ra

Massagetal208
neutron number120
relative atomic mass
208,001855012 ± 0,000009686 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,11 ± 0,045 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
α (α emission)87%
β+ (β+ decay; β+ = ϵ + e+)

209Ra

Massagetal209
neutron number121
relative atomic mass
209,001994902 ± 0,000006169 Da
g-factor
0,3444 ± 0,0052
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4,71 ± 0,08 s
spin5/2
nuclear quadrupole moment
0,39 ± 0,04
ontdekkingsdatum1967
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

210Ra

Massagetal210
neutron number122
relative atomic mass
210,000475406 ± 0,000009868 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4 ± 0,1 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

211Ra

Massagetal211
neutron number123
relative atomic mass
211,000893049 ± 0,000005331 Da
g-factor
0,3496 ± 0,0016
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
12,6 ± 1,2 s
spin5/2
nuclear quadrupole moment
0,46 ± 0,04
ontdekkingsdatum1967
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

212Ra

Massagetal212
neutron number124
relative atomic mass
211,999786619 ± 0,000011007 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
13 ± 0,2 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
α (α emission)
β+ (β+ decay; β+ = ϵ + e+)

213Ra

Massagetal213
neutron number125
relative atomic mass
213,000370971 ± 0,00001054 Da
g-factor
1,22 ± 0,004
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,73 ± 0,05 m
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1955
parity-

decay modeintensity
α (α emission)87%
β+ (β+ decay; β+ = ϵ + e+)13%

214Ra

Massagetal214
neutron number126
relative atomic mass
214,00009956 ± 0,000005636 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,437 ± 0,016 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
α (α emission)99.941%
β+ (β+ decay; β+ = ϵ + e+)0.059%

215Ra

Massagetal215
neutron number127
relative atomic mass
215,002718208 ± 0,00000773 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,669 ± 0,009 ms
spin9/2
nuclear quadrupole moment
ontdekkingsdatum1967
parity+

decay modeintensity
α (α emission)100%

216Ra

Massagetal216
neutron number128
relative atomic mass
216,003533534 ± 0,000008592 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
172 ± 7 ns
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1972
parity+

decay modeintensity
α (α emission)100%
ϵ (electron capture)1%

217Ra

Massagetal217
neutron number129
relative atomic mass
217,006322676 ± 0,000007564 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,95 ± 0,12 us
spin9/2
nuclear quadrupole moment
ontdekkingsdatum1970
parity+

decay modeintensity
α (α emission)100%

218Ra

Massagetal218
neutron number130
relative atomic mass
218,007134297 ± 0,000010528 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
25,91 ± 0,14 us
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1970
parity+

decay modeintensity
α (α emission)100%

219Ra

Massagetal219
neutron number131
relative atomic mass
219,010084715 ± 0,000007315 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
9 ± 2 ms
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1952
parity

decay modeintensity
α (α emission)100%

220Ra

Massagetal220
neutron number132
relative atomic mass
220,011027542 ± 0,000008153 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
18,1 ± 1,2 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1949
parity+

decay modeintensity
α (α emission)100%

221Ra

Massagetal221
neutron number133
relative atomic mass
221,013917293 ± 0,00000497 Da
g-factor
-0,0716 ± 0,00068
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
25 ± 4 s
spin5/2
nuclear quadrupole moment
1,92 ± 0,06
ontdekkingsdatum1949
parity+

decay modeintensity
α (α emission)100%
14C1.2%

222Ra

Massagetal222
neutron number134
relative atomic mass
222,015373371 ± 0,000004781 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
33,6 ± 0,4 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1948
parity+

decay modeintensity
α (α emission)100%
14C3%

223Ra

Massagetal223
neutron number135
relative atomic mass
223,018500648 ± 0,000002243 Da
g-factor
0,17946666666667 ± 0,00053333333333333
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,4352 ± 0,001 d
spin3/2
nuclear quadrupole moment
1,22 ± 0,03
ontdekkingsdatum1905
parity+

decay modeintensity
α (α emission)100%
14C8.9%

224Ra

Massagetal224
neutron number136
relative atomic mass
224,020210361 ± 0,000001944 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
3,6316 ± 0,0014 d
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1902
parity+

decay modeintensity
α (α emission)100%
14C4%

225Ra

Massagetal225
neutron number137
relative atomic mass
225,023610502 ± 0,000002786 Da
g-factor
-1,46 ± 0,004
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
14,82 ± 0,19 d
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1947
parity+

decay modeintensity
β (β decay)100%

226Ra

Massagetal226
neutron number138
relative atomic mass
226,025408186 ± 0,000002068 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,6 ± 0,007 ky
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1898
parity+

decay modeintensity
α (α emission)100%
14C2.6%
(double β decay)

227Ra

Massagetal227
neutron number139
relative atomic mass
227,029176205 ± 0,000002089 Da
g-factor
-0,26733333333333 ± 0,00073333333333333
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
42,2 ± 0,5 m
spin3/2
nuclear quadrupole moment
1,53 ± 0,06
ontdekkingsdatum1953
parity+

decay modeintensity
β (β decay)100%

228Ra

Massagetal228
neutron number140
relative atomic mass
228,031068574 ± 0,000002141 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,75 ± 0,03 y
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1907
parity+

decay modeintensity
β (β decay)100%

229Ra

Massagetal229
neutron number141
relative atomic mass
229,034956703 ± 0,000016576 Da
g-factor
0,19968 ± 0,00056
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4 ± 0,2 m
spin5/2
nuclear quadrupole moment
2,99 ± 0,12
ontdekkingsdatum1975
parity+

decay modeintensity
β (β decay)100%

230Ra

Massagetal230
neutron number142
relative atomic mass
230,037054776 ± 0,000011053 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
93 ± 2 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1978
parity+

decay modeintensity
β (β decay)100%

231Ra

Massagetal231
neutron number143
relative atomic mass
231,041027085 ± 0,000012206 Da
g-factor
-0,14216 ± 0,00044
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
104 ± 1 s
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1983
parity+

decay modeintensity
β (β decay)100%

232Ra

Massagetal232
neutron number144
relative atomic mass
232,043475267 ± 0,000009823 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4 ± 0,3 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1983
parity+

decay modeintensity
β (β decay)100%

233Ra

Massagetal233
neutron number145
relative atomic mass
233,04759457 ± 0,000009235 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
30 ± 5 s
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1990
parity+

decay modeintensity
β (β decay)100%

234Ra

Massagetal234
neutron number146
relative atomic mass
234,0503821 ± 0,000009 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
30 ± 10 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1990
parity+

decay modeintensity
β (β decay)100%
β SF (β-delayed fission)

235Ra

Massagetal235
neutron number147
relative atomic mass
235,05489 ± 0,000322 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin5/2
nuclear quadrupole moment
ontdekkingsdatum
parity+

decay modeintensity
β (β decay)
Radium226

geskiedenis

Ontdek deurPierre and Marie Curie
ligging van ontdekkingFrance
ontdekkingsdatum1898
etimologieLatin: radius (ray).
uitspraakRAY-di-em (Engels)

source

Abundance
Abundance in Earth's crust
0,0000009 mg/kg
natural abundance (oseaan)
0,000000000089 mg/L
natural abundance (human body)
0,0000000000001 %
natural abundance (Meteoroïde)
natural abundance (Son)
Abundance in Universe
0 %

Nuclear Screening Constants