Radium (Ra)

grundstof med atomnummer 88

Atomnummer	88
Atommasse	226
mass number	201

Gruppe	2
Periode	7
Blok	s

proton	88 p⁺
neutron	113 n⁰
elektron	88 e^-

Fysisk Egenskab

Atomradius	215 pm 292 pm
molar volume	45 cm³/mol
Kovalent Radius	201 pm 173 pm 159 pm 221 pm
Metallic Radius
Ionisk radius	148 pm 170 pm
Crystal Radius	162 pm 184 pm
Van der Waals-radius	283 pm 327 pm 283 pm 367,7 pm
massefylde	5 g/cm³

Kemisk Egenskab

energi

proton affinity
electron affinity	0,1 eV/particle
ioniseringsenergi	5,278424 eV/particle 10,147153 eV/particle 31 eV/particle 41 eV/particle 52,9 eV/particle 64 eV/particle 82 eV/particle 97 eV/particle 100 eV/particle 140 eV/particle 204,9 eV/particle 227 eV/particle 250 eV/particle 274 eV/particle 299 eV/particle 324 eV/particle 356 eV/particle 382 eV/particle 409 eV/particle 435 eV/particle 570 eV/particle 600 eV/particle 630 eV/particle 660 eV/particle 740 eV/particle 770 eV/particle 860 eV/particle 900 eV/particle 970 eV/particle 1.040 eV/particle 1.110 eV/particle 1.180 eV/particle 1.250 eV/particle 1.320 eV/particle 1.390 eV/particle 1.460 eV/particle 1.530 eV/particle 1.610 eV/particle 1.680 eV/particle 1.750 eV/particle 1.820 eV/particle 1.880 eV/particle 2.208 eV/particle 2.271 eV/particle 2.338 eV/particle 2.409 eV/particle 2.477 eV/particle 2.544 eV/particle 2.662 eV/particle 2.731 eV/particle 2.806 eV/particle 2.876 eV/particle 3.155 eV/particle 3.224 eV/particle 3.300 eV/particle 3.368 eV/particle 3.682 eV/particle 3.762 eV/particle 3.959 eV/particle 4.040 eV/particle 6.565 eV/particle 6.718 eV/particle 6.881 eV/particle 7.056 eV/particle 7.222 eV/particle 7.380 eV/particle 7.720 eV/particle 7.890 eV/particle 8.080 eV/particle 8.250 eV/particle 8.730 eV/particle 8.880 eV/particle 9.040 eV/particle 9.200 eV/particle 10.190 eV/particle 10.360 eV/particle 10.720 eV/particle 10.890 eV/particle 22.900 eV/particle 23.300 eV/particle 23.750 eV/particle 24.160 eV/particle 27.830 eV/particle 28.370 eV/particle 29.050 eV/particle 29.479,8 eV/particle 116.848,7 eV/particle 118.931,3 eV/particle

Fordampningsvarme	113 kJ/mol
smeltevarme	9,6 kJ/mol
standard enthalpy of formation	159 kJ/mol
elektron

Elektronskal	2, 8, 18, 32, 18, 8, 2

Valenselektron	2 ⓘ

electron configuration	[Rn] 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s²

Oxidationstrin	2
Elektronegativitet	0.09789 0.9
Electrophilicity Index	0,6982685447294388 eV/particle
fundamental state of matter

stoffase	Fast stof
gaseous state of matter
Kogepunkt
Smeltepunkt	969,15 K
critical pressure
critical temperature
trippelpunkt
appearance
farve	Silver #ffffff #007d00 #007d00
appearance	silvery white metallic
Brydningsindeks
materialeegenskab
Varmeledningsevne
Termisk ekspansion
molar heat capacity
Varmefylde
Adiabateksponenten
electrical properties
type	Conductor
specifik ledningsevne	1 MS/m
Elektrisk resistivitet	0,000001 Ω*m
superledning
Magnetisme
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curietemperaturen
Néel temperature
struktur
Krystalstruktur	Rumcentreret Kubisk ()
lattice constant
Lattice Angles	π/2, π/2, π/2
mechanical property
hårdhed
Kompressibilitetsmodul
Forskydningsmodul
E-modul
Poissons forhold
speed of sound
klassificering
Kategori	Jordalkalimetaller, Alkaline earth metals
CAS Group	IIA
IUPAC Group	IIA
Glawe Number	13
Mendeleev Number	10
Pettifor Number	13
Geochemical Class	U/Th decay series
Goldschmidt classification	litophile

øvrige

Gas Basicity
polarizability	246 ± 4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	13
Neutron Mass Absorption
quantum number	1S0
rumgruppe	229 (Im_3m)

Isotopes of Radium

Stable Isotopes	0
Unstable Isotopes	35
Natural Isotopes	0

²⁰¹Ra

mass number	201
neutron number	113
Relative Atomic Mass	201,012814699 ± 0,000021794 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	20 ± 30 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	2005
Paritet	-

decay mode	Intensitet
α (α emission)	100%

²⁰²Ra

mass number	202
neutron number	114
Relative Atomic Mass	202,009742305 ± 0,000016122 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	4,1 ± 1,1 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	2005
Paritet	+

decay mode	Intensitet
α (α emission)	100%

²⁰³Ra

mass number	203
neutron number	115
Relative Atomic Mass	203,009233907 ± 0,0000104 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	36 ± 13 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1996
Paritet	-

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

²⁰⁴Ra

mass number	204
neutron number	116
Relative Atomic Mass	204,006506855 ± 0,00000958 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	60 ± 9 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1995
Paritet	+

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

²⁰⁵Ra

mass number	205
neutron number	117
Relative Atomic Mass	205,006230692 ± 0,000024446 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	220 ± 50 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1987
Paritet	-

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

²⁰⁶Ra

mass number	206
neutron number	118
Relative Atomic Mass	206,003827842 ± 0,000019332 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	240 ± 20 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1967
Paritet	+

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

²⁰⁷Ra

mass number	207
neutron number	119
Relative Atomic Mass	207,00377242 ± 0,000062572 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,38 ± 0,18 s
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1967
Paritet	-

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

²⁰⁸Ra

mass number	208
neutron number	120
Relative Atomic Mass	208,001855012 ± 0,000009686 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,11 ± 0,045 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1967
Paritet	+

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

²⁰⁹Ra

mass number	209
neutron number	121
Relative Atomic Mass	209,001994902 ± 0,000006169 Da
g-factor	0,3444 ± 0,0052
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	4,71 ± 0,08 s
spin	5/2
nuclear quadrupole moment	0,39 ± 0,04
opdagelsesdato	1967
Paritet	-

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

²¹⁰Ra

mass number	210
neutron number	122
Relative Atomic Mass	210,000475406 ± 0,000009868 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	4 ± 0,1 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1967
Paritet	+

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

²¹¹Ra

mass number	211
neutron number	123
Relative Atomic Mass	211,000893049 ± 0,000005331 Da
g-factor	0,3496 ± 0,0016
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	12,6 ± 1,2 s
spin	5/2
nuclear quadrupole moment	0,46 ± 0,04
opdagelsesdato	1967
Paritet	-

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

²¹²Ra

mass number	212
neutron number	124
Relative Atomic Mass	211,999786619 ± 0,000011007 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	13 ± 0,2 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1967
Paritet	+

decay mode	Intensitet
α (α emission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²¹³Ra

mass number	213
neutron number	125
Relative Atomic Mass	213,000370971 ± 0,00001054 Da
g-factor	1,22 ± 0,004
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,73 ± 0,05 m
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1955
Paritet	-

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

²¹⁴Ra

mass number	214
neutron number	126
Relative Atomic Mass	214,00009956 ± 0,000005636 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,437 ± 0,016 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1967
Paritet	+

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

²¹⁵Ra

mass number	215
neutron number	127
Relative Atomic Mass	215,002718208 ± 0,00000773 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,669 ± 0,009 ms
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1967
Paritet	+

decay mode	Intensitet
α (α emission)	100%

²¹⁶Ra

mass number	216
neutron number	128
Relative Atomic Mass	216,003533534 ± 0,000008592 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	172 ± 7 ns
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1972
Paritet	+

decay mode	Intensitet
α (α emission)	100%
ϵ (electron capture)	1%

²¹⁷Ra

mass number	217
neutron number	129
Relative Atomic Mass	217,006322676 ± 0,000007564 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,95 ± 0,12 us
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1970
Paritet	+

decay mode	Intensitet
α (α emission)	100%

²¹⁸Ra

mass number	218
neutron number	130
Relative Atomic Mass	218,007134297 ± 0,000010528 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	25,91 ± 0,14 us
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1970
Paritet	+

decay mode	Intensitet
α (α emission)	100%

²¹⁹Ra

mass number	219
neutron number	131
Relative Atomic Mass	219,010084715 ± 0,000007315 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	9 ± 2 ms
spin	7/2
nuclear quadrupole moment
opdagelsesdato	1952
Paritet

decay mode	Intensitet
α (α emission)	100%

²²⁰Ra

mass number	220
neutron number	132
Relative Atomic Mass	220,011027542 ± 0,000008153 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	18,1 ± 1,2 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1949
Paritet	+

decay mode	Intensitet
α (α emission)	100%

²²¹Ra

mass number	221
neutron number	133
Relative Atomic Mass	221,013917293 ± 0,00000497 Da
g-factor	-0,0716 ± 0,00068
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	25 ± 4 s
spin	5/2
nuclear quadrupole moment	1,92 ± 0,06
opdagelsesdato	1949
Paritet	+

decay mode	Intensitet
α (α emission)	100%
14C	1.2%

²²²Ra

mass number	222
neutron number	134
Relative Atomic Mass	222,015373371 ± 0,000004781 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	33,6 ± 0,4 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1948
Paritet	+

decay mode	Intensitet
α (α emission)	100%
14C	3%

²²³Ra

mass number	223
neutron number	135
Relative Atomic Mass	223,018500648 ± 0,000002243 Da
g-factor	0,17946666666667 ± 0,00053333333333333
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	11,4352 ± 0,001 d
spin	3/2
nuclear quadrupole moment	1,22 ± 0,03
opdagelsesdato	1905
Paritet	+

decay mode	Intensitet
α (α emission)	100%
14C	8.9%

²²⁴Ra

mass number	224
neutron number	136
Relative Atomic Mass	224,020210361 ± 0,000001944 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	3,6316 ± 0,0014 d
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1902
Paritet	+

decay mode	Intensitet
α (α emission)	100%
14C	4%

²²⁵Ra

mass number	225
neutron number	137
Relative Atomic Mass	225,023610502 ± 0,000002786 Da
g-factor	-1,46 ± 0,004
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	14,82 ± 0,19 d
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1947
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²²⁶Ra

mass number	226
neutron number	138
Relative Atomic Mass	226,025408186 ± 0,000002068 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,6 ± 0,007 ky
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1898
Paritet	+

decay mode	Intensitet
α (α emission)	100%
14C	2.6%
2β⁻ (double β⁻ decay)

²²⁷Ra

mass number	227
neutron number	139
Relative Atomic Mass	227,029176205 ± 0,000002089 Da
g-factor	-0,26733333333333 ± 0,00073333333333333
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	42,2 ± 0,5 m
spin	3/2
nuclear quadrupole moment	1,53 ± 0,06
opdagelsesdato	1953
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²²⁸Ra

mass number	228
neutron number	140
Relative Atomic Mass	228,031068574 ± 0,000002141 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	5,75 ± 0,03 y
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1907
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²²⁹Ra

mass number	229
neutron number	141
Relative Atomic Mass	229,034956703 ± 0,000016576 Da
g-factor	0,19968 ± 0,00056
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	4 ± 0,2 m
spin	5/2
nuclear quadrupole moment	2,99 ± 0,12
opdagelsesdato	1975
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²³⁰Ra

mass number	230
neutron number	142
Relative Atomic Mass	230,037054776 ± 0,000011053 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	93 ± 2 m
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1978
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²³¹Ra

mass number	231
neutron number	143
Relative Atomic Mass	231,041027085 ± 0,000012206 Da
g-factor	-0,14216 ± 0,00044
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	104 ± 1 s
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1983
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²³²Ra

mass number	232
neutron number	144
Relative Atomic Mass	232,043475267 ± 0,000009823 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	4 ± 0,3 m
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1983
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²³³Ra

mass number	233
neutron number	145
Relative Atomic Mass	233,04759457 ± 0,000009235 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	30 ± 5 s
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1990
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

²³⁴Ra

mass number	234
neutron number	146
Relative Atomic Mass	234,0503821 ± 0,000009 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	30 ± 10 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1990
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)

²³⁵Ra

mass number	235
neutron number	147
Relative Atomic Mass	235,05489 ± 0,000322 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	5/2
nuclear quadrupole moment
opdagelsesdato
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)

historie

opdager eller opfinder	Pierre and Marie Curie
fundsted	France
opdagelsesdato	1898
etymologi	Latin: radius (ray).
udtale	RAY-di-em (engelsk)

source

Forekomst
Abundance in Earth's crust	0,0000009 mg/kg
natural abundance (verdenshave)	0,000000000089 mg/L
natural abundance (menneskelige krop)	0,0000000000001 %
natural abundance (Meteoroid)
natural abundance (Solen)
Abundance in Universe	0 %

Nuclear Screening Constants

Radium on ChemicalAid

AEDA subject keyword ID	17547
AUT NKC	ph150526
Australian Educational Vocabulary ID	scot/3564
BNCF	18888
BNE-identifikator	XX526711
BNF	11979118t
Brockhaus Enzyklopädie online ID	radium
CAB ID	18810
CAS-nummer	7440-14-4
ChEBI-ID	33325
ChemSpider ID	4886483
DSSTOX compound identifier	DTXCID70875702
DSSTox substance ID	DTXSID2024294
Den Store Danske-ID	radium
ECHA Substance Infocard ID	100.028.293
Enciclopedia Treccani	radio_res-fda11266-e1eb-11df-9962-d5ce3506d72e
Encyclopædia Britannica Online-ID	science/radium
Encyclopædia Universalis-ID	radium
Freebase-ID	/m/025scm7
French Vikidia ID	Radium
GND-identifikator	4176842-5
Golden ID	Radium-ZX5K8
InChI	InChI=1S/Ra
InChIKey	HCWPIIXVSYCSAN-UHFFFAOYSA-N
KBpedia ID	Radium
Krugosvet article	nauka_i_tehnika/himiya/RADI.html
LCAuth	sh85110804
MeSH ID	D011883
NDL-nummer	00569336
NE.se ID	radium
Namuwiki ID	라듐
National Library of Israel J9U ID	987007560614605171
OmegaWiki-betydningsdefinition	347064
Online PWN Encyclopedia ID	3965238
OpenAlex ID	C550196577
PSH-ID	5755
PubChem CID	6328144
Quora emne-ID	Radium
RxNorm ID	1546450
Spanish Vikidia ID	Radio_(elemento_químico)
Store medisinske leksikon ID	radium
Store norske leksikon-ID	radium
Store russiske encyklopædi Online-ID	3489135
The Encyclopedia of Science Fiction ID	radium
UK Archival Thesaurus ID	f2/mt225/4347/5017
UNESCO-tesaurus identifikationskode	concept14022
UNII	W90AYD6R3Q
USGS Thesaurus ID	1551
WordNet 3.1 Synset ID	14676100-n
YSO ID	19781

Radium (Ra)

Fysisk Egenskab

Kemisk Egenskab

øvrige

Isotopes of Radium

201Ra

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

235Ra

historie

source

Nuclear Screening Constants

²⁰¹Ra

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

²³⁵Ra