Radij (Ra)

chemical element with the atomic number of 88

Atomski broj	88
Relativna atomska masa	226
Maseni broj	201

Skupina	2
Perioda	7
Blok	s

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

Animated Bohrov model atoma of Ra (Radij)

Physical Property

Atomski Radijus	215 pm 292 pm
Molni volumen	45 cm³/mol
Kovalentni Radijus	201 pm 173 pm 159 pm 221 pm
Metallic Radius
Ionski radijus	148 pm 170 pm
Crystal Radius	162 pm 184 pm
Van der Waals radius	283 pm 327 pm 283 pm 367,7 pm
gustoća	5 g/cm³

Kemijsko Svojstvo

energija

proton affinity
Elektronski afinitet	0,1 eV/particle
ionization energy	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

Toplina isparivanja	113 kJ/mol
toplina taljenja	9,6 kJ/mol
standard enthalpy of formation	159 kJ/mol
elektron

Elektronska ljuska	2, 8, 18, 32, 18, 8, 2

valence electron	2 ⓘ

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

Oksidacijski broj	2
Elektronegativnost	0.09789 0.9
Electrophilicity Index	0,6982685447294388 eV/particle
fundamental state of matter

agregatno stanje	Čvrsto
gaseous state of matter
Vrelište
Talište	969,15 K
critical pressure
critical temperature
Trojna točka
appearance
boja	Srebrna #ffffff #007d00 #007d00
appearance	silvery white metallic
Indeks prelamanja
thermodynamic material property
Toplinska vodljivost
Toplinsko istezanje
molar heat capacity
Specifični toplinski kapacitet
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	1 MS/m
Električna otpornost i provodnost	0,000001 Ω*m
Supravodljivost
Magnetizam
type
Magnetna susceptibilnost (Mass)
Magnetna susceptibilnost (Molar)
Magnetna susceptibilnost (Volume)
magnetic ordering
Curieva temperatura
Néel temperature
struktura
Kristalna struktura	Kubna prostorno centrirana ()
lattice constant
Lattice Angles	π/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Youngov modul elastičnosti
Poissonov omjer
brzina zvuka
classification
Kategorija	Zemnoalkalijski metali, 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

other

Gas Basicity
polarizability	246 ± 4 a₀
C6 Dispersion Coefficient
allotrope
Nuklearni udarni presjek	13
Neutron Mass Absorption
Kvantni brojevi	1S0
space group	229 (Im_3m)

Isotopes of Radium

Stabilni izotopi	0
Nestabilni izotopi	35
Natural Isotopes	0

²⁰¹Ra

Maseni broj	201
neutron number	113
Relativna Atomska Masa	201,012814699 ± 0,000021794 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	20 ± 30 ms
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	2005
Parnost	-

decay mode	intensity
α (α emission)	100%

²⁰²Ra

Maseni broj	202
neutron number	114
Relativna Atomska Masa	202,009742305 ± 0,000016122 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4,1 ± 1,1 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	2005
Parnost	+

decay mode	intensity
α (α emission)	100%

²⁰³Ra

Maseni broj	203
neutron number	115
Relativna Atomska Masa	203,009233907 ± 0,0000104 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	36 ± 13 ms
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1996
Parnost	-

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

²⁰⁴Ra

Maseni broj	204
neutron number	116
Relativna Atomska Masa	204,006506855 ± 0,00000958 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	60 ± 9 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1995
Parnost	+

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

²⁰⁵Ra

Maseni broj	205
neutron number	117
Relativna Atomska Masa	205,006230692 ± 0,000024446 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	220 ± 50 ms
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1987
Parnost	-

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

²⁰⁶Ra

Maseni broj	206
neutron number	118
Relativna Atomska Masa	206,003827842 ± 0,000019332 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	240 ± 20 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1967
Parnost	+

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

²⁰⁷Ra

Maseni broj	207
neutron number	119
Relativna Atomska Masa	207,00377242 ± 0,000062572 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,38 ± 0,18 s
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1967
Parnost	-

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

²⁰⁸Ra

Maseni broj	208
neutron number	120
Relativna Atomska Masa	208,001855012 ± 0,000009686 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,11 ± 0,045 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1967
Parnost	+

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

²⁰⁹Ra

Maseni broj	209
neutron number	121
Relativna Atomska Masa	209,001994902 ± 0,000006169 Da
g-factor	0,3444 ± 0,0052
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4,71 ± 0,08 s
spin	5/2
nuclear quadrupole moment	0,39 ± 0,04
vrijeme otkrića ili izuma	1967
Parnost	-

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

²¹⁰Ra

Maseni broj	210
neutron number	122
Relativna Atomska Masa	210,000475406 ± 0,000009868 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4 ± 0,1 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1967
Parnost	+

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

²¹¹Ra

Maseni broj	211
neutron number	123
Relativna Atomska Masa	211,000893049 ± 0,000005331 Da
g-factor	0,3496 ± 0,0016
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	12,6 ± 1,2 s
spin	5/2
nuclear quadrupole moment	0,46 ± 0,04
vrijeme otkrića ili izuma	1967
Parnost	-

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

²¹²Ra

Maseni broj	212
neutron number	124
Relativna Atomska Masa	211,999786619 ± 0,000011007 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	13 ± 0,2 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1967
Parnost	+

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

²¹³Ra

Maseni broj	213
neutron number	125
Relativna Atomska Masa	213,000370971 ± 0,00001054 Da
g-factor	1,22 ± 0,004
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,73 ± 0,05 m
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1955
Parnost	-

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

²¹⁴Ra

Maseni broj	214
neutron number	126
Relativna Atomska Masa	214,00009956 ± 0,000005636 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,437 ± 0,016 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1967
Parnost	+

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

²¹⁵Ra

Maseni broj	215
neutron number	127
Relativna Atomska Masa	215,002718208 ± 0,00000773 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,669 ± 0,009 ms
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1967
Parnost	+

decay mode	intensity
α (α emission)	100%

²¹⁶Ra

Maseni broj	216
neutron number	128
Relativna Atomska Masa	216,003533534 ± 0,000008592 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	172 ± 7 ns
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1972
Parnost	+

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

²¹⁷Ra

Maseni broj	217
neutron number	129
Relativna Atomska Masa	217,006322676 ± 0,000007564 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,95 ± 0,12 us
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1970
Parnost	+

decay mode	intensity
α (α emission)	100%

²¹⁸Ra

Maseni broj	218
neutron number	130
Relativna Atomska Masa	218,007134297 ± 0,000010528 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	25,91 ± 0,14 us
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1970
Parnost	+

decay mode	intensity
α (α emission)	100%

²¹⁹Ra

Maseni broj	219
neutron number	131
Relativna Atomska Masa	219,010084715 ± 0,000007315 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	9 ± 2 ms
spin	7/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1952
Parnost

decay mode	intensity
α (α emission)	100%

²²⁰Ra

Maseni broj	220
neutron number	132
Relativna Atomska Masa	220,011027542 ± 0,000008153 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	18,1 ± 1,2 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1949
Parnost	+

decay mode	intensity
α (α emission)	100%

²²¹Ra

Maseni broj	221
neutron number	133
Relativna Atomska Masa	221,013917293 ± 0,00000497 Da
g-factor	−0,0716 ± 0,00068
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	25 ± 4 s
spin	5/2
nuclear quadrupole moment	1,92 ± 0,06
vrijeme otkrića ili izuma	1949
Parnost	+

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

²²²Ra

Maseni broj	222
neutron number	134
Relativna Atomska Masa	222,015373371 ± 0,000004781 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	33,6 ± 0,4 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1948
Parnost	+

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

²²³Ra

Maseni broj	223
neutron number	135
Relativna Atomska Masa	223,018500648 ± 0,000002243 Da
g-factor	0,17946666666667 ± 0,00053333333333333
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	11,4352 ± 0,001 d
spin	3/2
nuclear quadrupole moment	1,22 ± 0,03
vrijeme otkrića ili izuma	1905
Parnost	+

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

²²⁴Ra

Maseni broj	224
neutron number	136
Relativna Atomska Masa	224,020210361 ± 0,000001944 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	3,6316 ± 0,0014 d
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1902
Parnost	+

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

²²⁵Ra

Maseni broj	225
neutron number	137
Relativna Atomska Masa	225,023610502 ± 0,000002786 Da
g-factor	−1,46 ± 0,004
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	14,82 ± 0,19 d
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1947
Parnost	+

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

²²⁶Ra

Maseni broj	226
neutron number	138
Relativna Atomska Masa	226,025408186 ± 0,000002068 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,6 ± 0,007 ky
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1898
Parnost	+

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

²²⁷Ra

Maseni broj	227
neutron number	139
Relativna Atomska Masa	227,029176205 ± 0,000002089 Da
g-factor	−0,26733333333333 ± 0,00073333333333333
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	42,2 ± 0,5 m
spin	3/2
nuclear quadrupole moment	1,53 ± 0,06
vrijeme otkrića ili izuma	1953
Parnost	+

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

²²⁸Ra

Maseni broj	228
neutron number	140
Relativna Atomska Masa	228,031068574 ± 0,000002141 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	5,75 ± 0,03 y
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1907
Parnost	+

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

²²⁹Ra

Maseni broj	229
neutron number	141
Relativna Atomska Masa	229,034956703 ± 0,000016576 Da
g-factor	0,19968 ± 0,00056
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4 ± 0,2 m
spin	5/2
nuclear quadrupole moment	2,99 ± 0,12
vrijeme otkrića ili izuma	1975
Parnost	+

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

²³⁰Ra

Maseni broj	230
neutron number	142
Relativna Atomska Masa	230,037054776 ± 0,000011053 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	93 ± 2 m
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1978
Parnost	+

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

²³¹Ra

Maseni broj	231
neutron number	143
Relativna Atomska Masa	231,041027085 ± 0,000012206 Da
g-factor	−0,14216 ± 0,00044
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	104 ± 1 s
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1983
Parnost	+

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

²³²Ra

Maseni broj	232
neutron number	144
Relativna Atomska Masa	232,043475267 ± 0,000009823 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4 ± 0,3 m
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1983
Parnost	+

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

²³³Ra

Maseni broj	233
neutron number	145
Relativna Atomska Masa	233,04759457 ± 0,000009235 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	30 ± 5 s
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1990
Parnost	+

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

²³⁴Ra

Maseni broj	234
neutron number	146
Relativna Atomska Masa	234,0503821 ± 0,000009 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	30 ± 10 s
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1990
Parnost	+

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

²³⁵Ra

Maseni broj	235
neutron number	147
Relativna Atomska Masa	235,05489 ± 0,000322 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)

povijest

otkrio/izumio	Pierre and Marie Curie
location of discovery	France
vrijeme otkrića ili izuma	1898
Etimologija	Latin: radius (ray).
pronunciation	RAY-di-em (engleski)

source

Obilnost
Zastupljenost u Zemljinoj kori	0,0000009 mg/kg
natural abundance (ocean)	0,000000000089 mg/L
natural abundance (tijelo)	0,0000000000001 %
natural abundance (meteoroid)
natural abundance (Sunce)
Zastupljenost u svemiru	0 %

Nuclear Screening Constants

Radij on ChemicalAid

AEDA subject keyword ID	17547
Australian Educational Vocabulary ID	scot/3564
BNCF Thesaurus ID	18888
BNF	11979118t
Biblioteca Nacional de España ID	XX526711
Brockhaus Enzyklopädie online ID	radium
CAB ID	18810
CAS registarski broj	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
Encyclopædia Universalis ID	radium
Freebase ID	/m/025scm7
French Vikidia ID	Radium
GND identifikator	4176842-5
Golden ID	Radium-ZX5K8
Great Russian Encyclopedia Online ID	3489135
ID oznaka teme na Quori	Radium
ID oznaka u mrežnoj enciklopediji Britannici	science/radium
InChI	InChI=1S/Ra
InChIKey	HCWPIIXVSYCSAN-UHFFFAOYSA-N
KBpedia ID	Radium
Krugosvet article	nauka_i_tehnika/himiya/RADI.html
LCCN	sh85110804
MeSH ID	D011883
NDL ID	00569336
NE.se ID	radium
NKCR broj	ph150526
Namuwiki ID	라듐
National Library of Israel J9U ID	987007560614605171
Online PWN Encyclopedia ID	3965238
OpenAlex ID	C550196577
PSH ID	5755
PubChem ID	6328144
RxNorm ID	1546450
Spanish Vikidia ID	Radio_(elemento_químico)
Store medisinske leksikon ID	radium
Store norske leksikon ID	radium
The Encyclopedia of Science Fiction ID	radium
Treccani ID	radio_res-fda11266-e1eb-11df-9962-d5ce3506d72e
UK Archival Thesaurus ID	f2/mt225/4347/5017
UNESCO Thesaurus ID	concept14022
UNII	W90AYD6R3Q
USGS Thesaurus ID	1551
WordNet 3.1 Synset ID	14676100-n
YSO ID	19781
značenje prema OmegaWiki	347064

Radij (Ra)

Physical Property

Kemijsko Svojstvo

other

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

povijest

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