Radi

Radi (Ra)

chemical element with the atomic number of 88
Atomic Number88
Atomic Weight226
Rhif màs201
Group2
Period7
Blocks
Proton88 p+
Niwtron113 n0
Electron88 e-
Animated Bohr model of Ra (Radi)

Nodwedd Ffisegol

Atomic Radius
215 pm
molar volume
covalent radius
201 pm
Metallic Radius
ionic radius
148 pm
Crystal Radius
162 pm
Van der Waals radius
283 pm
density
Atomic Radii Of The Elements: Radi0102030405060708090100110120130140150160170180190200210220230240250260270280290pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
5.278424 eV/particle
ionization energy of Ra (Radi)
enthalpy of vaporization
113 kJ/mol
enthalpy of fusion
9.6 kJ/mol
standard enthalpy of formation
159 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 32, 18, 8, 2
Bohr model: Ra (Radi)
valence electron2
Lewis structure: Ra (Radi)
trefn yr electronnau[Rn] 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2
Enhanced Bohr model of Ra (Radi)
Orbital Diagram of Ra (Radi)
Cyflwr ocsidiad2
Electronegatifedd
0.9
Electrophilicity Index
0.6982685447294388 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
Melting Point
969.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearancesilvery white metallic
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
1 MS/m
Gwrthedd
0.000001 m Ω
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureBody Centered Cubic ()
lattice constant
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
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
space group229 (Im_3m)

Isotopes of Radium

Stable Isotopes0
Unstable Isotopes35
Natural Isotopes0

201Ra

Rhif màs201
neutron number113
relative atomic mass
201.012814699 ± 0.000021794 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
20 ± 30 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod2005
parity-

decay modeintensity
α (α emission)100%

202Ra

Rhif màs202
neutron number114
relative atomic mass
202.009742305 ± 0.000016122 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.1 ± 1.1 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod2005
parity+

decay modeintensity
α (α emission)100%

203Ra

Rhif màs203
neutron number115
relative atomic mass
203.009233907 ± 0.0000104 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
36 ± 13 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1996
parity-

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

204Ra

Rhif màs204
neutron number116
relative atomic mass
204.006506855 ± 0.00000958 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
60 ± 9 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1995
parity+

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

205Ra

Rhif màs205
neutron number117
relative atomic mass
205.006230692 ± 0.000024446 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
220 ± 50 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1987
parity-

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

206Ra

Rhif màs206
neutron number118
relative atomic mass
206.003827842 ± 0.000019332 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
240 ± 20 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

207Ra

Rhif màs207
neutron number119
relative atomic mass
207.00377242 ± 0.000062572 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.38 ± 0.18 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1967
parity-

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

208Ra

Rhif màs208
neutron number120
relative atomic mass
208.001855012 ± 0.000009686 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.11 ± 0.045 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

209Ra

Rhif màs209
neutron number121
relative atomic mass
209.001994902 ± 0.000006169 Da
g-factor
0.3444 ± 0.0052
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.71 ± 0.08 s
spin5/2
nuclear quadrupole moment
0.39 ± 0.04
dyddiad darganfod1967
parity-

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

210Ra

Rhif màs210
neutron number122
relative atomic mass
210.000475406 ± 0.000009868 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4 ± 0.1 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

211Ra

Rhif màs211
neutron number123
relative atomic mass
211.000893049 ± 0.000005331 Da
g-factor
0.3496 ± 0.0016
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
12.6 ± 1.2 s
spin5/2
nuclear quadrupole moment
0.46 ± 0.04
dyddiad darganfod1967
parity-

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

212Ra

Rhif màs212
neutron number124
relative atomic mass
211.999786619 ± 0.000011007 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13 ± 0.2 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

213Ra

Rhif màs213
neutron number125
relative atomic mass
213.000370971 ± 0.00001054 Da
g-factor
1.22 ± 0.004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.73 ± 0.05 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1955
parity-

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

214Ra

Rhif màs214
neutron number126
relative atomic mass
214.00009956 ± 0.000005636 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.437 ± 0.016 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

215Ra

Rhif màs215
neutron number127
relative atomic mass
215.002718208 ± 0.00000773 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.669 ± 0.009 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1967
parity+

decay modeintensity
α (α emission)100%

216Ra

Rhif màs216
neutron number128
relative atomic mass
216.003533534 ± 0.000008592 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
172 ± 7 ns
spin0
nuclear quadrupole moment
0
dyddiad darganfod1972
parity+

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

217Ra

Rhif màs217
neutron number129
relative atomic mass
217.006322676 ± 0.000007564 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.95 ± 0.12 us
spin9/2
nuclear quadrupole moment
dyddiad darganfod1970
parity+

decay modeintensity
α (α emission)100%

218Ra

Rhif màs218
neutron number130
relative atomic mass
218.007134297 ± 0.000010528 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
25.91 ± 0.14 us
spin0
nuclear quadrupole moment
0
dyddiad darganfod1970
parity+

decay modeintensity
α (α emission)100%

219Ra

Rhif màs219
neutron number131
relative atomic mass
219.010084715 ± 0.000007315 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9 ± 2 ms
spin7/2
nuclear quadrupole moment
dyddiad darganfod1952
parity

decay modeintensity
α (α emission)100%

220Ra

Rhif màs220
neutron number132
relative atomic mass
220.011027542 ± 0.000008153 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
18.1 ± 1.2 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1949
parity+

decay modeintensity
α (α emission)100%

221Ra

Rhif màs221
neutron number133
relative atomic mass
221.013917293 ± 0.00000497 Da
g-factor
-0.0716 ± 0.00068
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
25 ± 4 s
spin5/2
nuclear quadrupole moment
1.92 ± 0.06
dyddiad darganfod1949
parity+

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

222Ra

Rhif màs222
neutron number134
relative atomic mass
222.015373371 ± 0.000004781 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
33.6 ± 0.4 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1948
parity+

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

223Ra

Rhif màs223
neutron number135
relative atomic mass
223.018500648 ± 0.000002243 Da
g-factor
0.17946666666667 ± 0.00053333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
11.4352 ± 0.001 d
spin3/2
nuclear quadrupole moment
1.22 ± 0.03
dyddiad darganfod1905
parity+

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

224Ra

Rhif màs224
neutron number136
relative atomic mass
224.020210361 ± 0.000001944 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.6316 ± 0.0014 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1902
parity+

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

225Ra

Rhif màs225
neutron number137
relative atomic mass
225.023610502 ± 0.000002786 Da
g-factor
-1.46 ± 0.004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
14.82 ± 0.19 d
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1947
parity+

decay modeintensity
β (β decay)100%

226Ra

Rhif màs226
neutron number138
relative atomic mass
226.025408186 ± 0.000002068 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.6 ± 0.007 ky
spin0
nuclear quadrupole moment
0
dyddiad darganfod1898
parity+

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

227Ra

Rhif màs227
neutron number139
relative atomic mass
227.029176205 ± 0.000002089 Da
g-factor
-0.26733333333333 ± 0.00073333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
42.2 ± 0.5 m
spin3/2
nuclear quadrupole moment
1.53 ± 0.06
dyddiad darganfod1953
parity+

decay modeintensity
β (β decay)100%

228Ra

Rhif màs228
neutron number140
relative atomic mass
228.031068574 ± 0.000002141 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.75 ± 0.03 y
spin0
nuclear quadrupole moment
0
dyddiad darganfod1907
parity+

decay modeintensity
β (β decay)100%

229Ra

Rhif màs229
neutron number141
relative atomic mass
229.034956703 ± 0.000016576 Da
g-factor
0.19968 ± 0.00056
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4 ± 0.2 m
spin5/2
nuclear quadrupole moment
2.99 ± 0.12
dyddiad darganfod1975
parity+

decay modeintensity
β (β decay)100%

230Ra

Rhif màs230
neutron number142
relative atomic mass
230.037054776 ± 0.000011053 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
93 ± 2 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1978
parity+

decay modeintensity
β (β decay)100%

231Ra

Rhif màs231
neutron number143
relative atomic mass
231.041027085 ± 0.000012206 Da
g-factor
-0.14216 ± 0.00044
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
104 ± 1 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1983
parity+

decay modeintensity
β (β decay)100%

232Ra

Rhif màs232
neutron number144
relative atomic mass
232.043475267 ± 0.000009823 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4 ± 0.3 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1983
parity+

decay modeintensity
β (β decay)100%

233Ra

Rhif màs233
neutron number145
relative atomic mass
233.04759457 ± 0.000009235 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
30 ± 5 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1990
parity+

decay modeintensity
β (β decay)100%

234Ra

Rhif màs234
neutron number146
relative atomic mass
234.0503821 ± 0.000009 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
30 ± 10 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1990
parity+

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

235Ra

Rhif màs235
neutron number147
relative atomic mass
235.05489 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
β (β decay)
Radium226

hanes

darganfyddwr neu ddyfeisiwrPierre and Marie Curie
man darganfodFrance
dyddiad darganfod1898
geirdarddiadLatin: radius (ray).
ynganiadRAY-di-em (Saesneg)

source

Abundance
Abundance in Earth's crust
0.0000009 mg/kg
natural abundance (cefnfor)
0.000000000089 mg/L
natural abundance (corff dynol)
0.0000000000001 %
natural abundance (Awyrfaen)
natural abundance (Haul)
Abundance in Universe
0 %

Nuclear Screening Constants