Francium (Fr)

Radioactive element, belongs to group 1 of the periodic table. Found in uranium and thorium ores. The 22 known isotopes are all radioactive, with the most stable being Fr-223. Its existence was confirmed in 1939 by Marguerite Perey.

Atomic Number	87
Atomic Weight	223
Mass Number	197

Group	1
Period	7
Block	s

Protons	87 p⁺
Neutrons	110 n⁰
Electrons	87 e^-

Properties

Energy
Atomic Radius	258 pm
Molar Volume
Covalent Radius	223 pm 218 pm 260 pm
Metallic Radius
Ionic Radius	180 pm
Crystal Radius	194 pm
Van der Waals Radius	348 pm 364 pm 348 pm 490 pm
Density	1.87 g/cm³
Proton Affinity
Electron Affinity	0.486 eV/particle
Ionization Energy	4.0727409 eV/particle 22.4 eV/particle 33 eV/particle 39.1 eV/particle 50 eV/particle 67 eV/particle 80 eV/particle 106 eV/particle 120 eV/particle 179 eV/particle 200 eV/particle 222.1 eV/particle 245 eV/particle 269 eV/particle 293 eV/particle 324 eV/particle 349 eV/particle 375 eV/particle 400 eV/particle 530 eV/particle 560 eV/particle 590 eV/particle 620 eV/particle 690 eV/particle 720 eV/particle 820 eV/particle 850 eV/particle 910 eV/particle 980 eV/particle 1,040 eV/particle 1,110 eV/particle 1,180 eV/particle 1,250 eV/particle 1,320 eV/particle 1,380 eV/particle 1,460 eV/particle 1,530 eV/particle 1,600 eV/particle 1,670 eV/particle 1,700 eV/particle 1,810 eV/particle 2,119 eV/particle 2,182 eV/particle 2,247 eV/particle 2,317 eV/particle 2,384 eV/particle 2,450 eV/particle 2,564 eV/particle 2,631 eV/particle 2,706 eV/particle 2,774 eV/particle 3,049 eV/particle 3,115 eV/particle 3,190 eV/particle 3,257 eV/particle 3,556 eV/particle 3,635 eV/particle 3,828 eV/particle 3,907 eV/particle 6,365 eV/particle 6,516 eV/particle 6,678 eV/particle 6,849 eV/particle 7,013 eV/particle 7,172 eV/particle 7,500 eV/particle 7,670 eV/particle 7,850 eV/particle 8,020 eV/particle 8,500 eV/particle 8,640 eV/particle 8,800 eV/particle 8,950 eV/particle 9,890 eV/particle 10,070 eV/particle 10,420 eV/particle 10,580 eV/particle 22,330 eV/particle 22,730 eV/particle 23,170 eV/particle 23,570 eV/particle 27,060 eV/particle 27,590 eV/particle 28,260 eV/particle 28,683.4 eV/particle 113,817.2 eV/particle 115,859 eV/particle

Heat of Vaporization
Heat of Fusion	15 kJ/mol
Heat of Formation
Electrons
Electron Shells	2, 8, 18, 32, 18, 8, 1

Valence Electrons	1

Electron Configuration	[Rn] 7s¹

Oxidation States	1
Electronegativity	0.08731 0.7
Electrophilicity	0.7242688826969913 eV/particle
Phases
Phase	Solid
Gas Phase
Boiling Point
Melting Point	294.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Color	Silver #ffffff #420066 #420066
Appearance
Refractive Index
Thermodynamic Properties
Thermal Conductivity
Thermal Expansion
Molar Heat Capacity
Specific Heat Capacity
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type
Electrical Conductivity
Electrical Resistivity
Superconducting Point
Magnetism
Type
Magnetic Susceptibility (Mass)
Magnetic Susceptibility (Molar)
Magnetic Susceptibility (Volume)
Magnetic Ordering
Curie Point
Neel Point
Structure
Crystal Structure	(BCC)
Lattice Constant
Lattice Angles
Mechanical Properties
Hardness
Bulk Modulus
Shear Modulus
Young Modulus
Poisson Ratio
Speed of Sound
Classification
Category	Alkali metals, Alkali metals
CAS Group	IA
IUPAC Group	IA
Glawe Number	7
Mendeleev Number	6
Pettifor Number	7
Geochemical Class	U/Th decay series
Goldschmidt Class	synthetic
Other
Gas Basicity
Dipole Polarizability	317.8 ± 2.4 a₀
C6 Dispersion Coefficient
Allotropes
Neutron Cross Section
Neutron Mass Absorption
Quantum Numbers	2S1/2
Space Group	()

Isotopes of Francium

Stable Isotopes	0
Unstable Isotopes	37
Radioactive Isotopes	37

¹⁹⁷Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	197.011008086 ± 0.000060584 Da
Mass Number	197
G-Factor
Half Life	2.3 ± 1.9 ms
Spin	7/2
Quadrupole Moment
Discovery Year	2013
Parity	-

¹⁹⁷Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

¹⁹⁸Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	198.010282081 ± 0.000033419 Da
Mass Number	198
G-Factor
Half Life	15 ± 3 ms
Spin	3
Quadrupole Moment
Discovery Year	2013
Parity	+

¹⁹⁸Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

¹⁹⁹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	199.007269384 ± 0.000014734 Da
Mass Number	199
G-Factor
Half Life	6.6 ± 2.2 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	1999
Parity	+

¹⁹⁹Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰⁰Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	200.006584666 ± 0.000032769 Da
Mass Number	200
G-Factor
Half Life	47.5 ± 2.8 ms
Spin	3
Quadrupole Moment
Discovery Year	1995
Parity	+

²⁰⁰Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
β⁺ SF (β⁺-delayed fission)	%

²⁰¹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	201.003852491 ± 0.000009747 Da
Mass Number	201
G-Factor
Half Life	62.8 ± 1.9 ms
Spin	9/2
Quadrupole Moment
Discovery Year	1980
Parity	-

²⁰¹Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰²Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	202.003329637 ± 0.000006476 Da
Mass Number	202
G-Factor	1.3 ± 0.016666666666667
Half Life	372 ± 12 ms
Spin	3
Quadrupole Moment
Discovery Year	1980
Parity	+

²⁰²Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰³Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	203.000940867 ± 0.000006689 Da
Mass Number	203
G-Factor	0.83111111111111 ± 0.0088888888888889
Half Life	550 ± 10 ms
Spin	9/2
Quadrupole Moment	-0.47 ± 0.02
Discovery Year	1967
Parity	-

²⁰³Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰⁴Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	204.000651972 ± 0.000026389 Da
Mass Number	204
G-Factor	1.33 ± 0.01
Half Life	1.75 ± 0.26 s
Spin	3
Quadrupole Moment	-0.141 ± 0.009
Discovery Year	1964
Parity	+

²⁰⁴Fr Decay Modes

Decay Mode	Intensity
α (α emission)	96%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰⁵Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	204.998593854 ± 0.000008399 Da
Mass Number	205
G-Factor	0.84444444444444 ± 0.0066666666666667
Half Life	3.9 ± 0.07 s
Spin	9/2
Quadrupole Moment	-0.305 ± 0.018
Discovery Year	1964
Parity	-

²⁰⁵Fr Decay Modes

Decay Mode	Intensity
α (α emission)	98.5%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	1.5%

²⁰⁶Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	205.998661441 ± 0.000029856 Da
Mass Number	206
G-Factor	1.3233333333333 ± 0.016666666666667
Half Life
Spin	3
Quadrupole Moment	-0.354 ± 0.009
Discovery Year	1964
Parity	+

²⁰⁶Fr Decay Modes

Decay Mode	Intensity
α (α emission)	88.4%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11.6%

²⁰⁷Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	206.99694145 ± 0.000018847 Da
Mass Number	207
G-Factor	0.86 ± 0.0088888888888889
Half Life	14.8 ± 0.1 s
Spin	9/2
Quadrupole Moment	-0.24 ± 0.02
Discovery Year	1964
Parity	-

²⁰⁷Fr Decay Modes

Decay Mode	Intensity
α (α emission)	95%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰⁸Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	207.997139082 ± 0.000012514 Da
Mass Number	208
G-Factor	0.67285714285714 ± 0.0057142857142857
Half Life	59.1 ± 0.3 s
Spin	7
Quadrupole Moment	0.052 ± 0.011
Discovery Year	1964
Parity	+

²⁰⁸Fr Decay Modes

Decay Mode	Intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11%

²⁰⁹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	208.995939701 ± 0.000012349 Da
Mass Number	209
G-Factor	0.87333333333333 ± 0.011111111111111
Half Life	50.5 ± 0.7 s
Spin	9/2
Quadrupole Moment	-0.26 ± 0.02
Discovery Year	1964
Parity	-

²⁰⁹Fr Decay Modes

Decay Mode	Intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11%

²¹⁰Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	209.996410596 ± 0.000014407 Da
Mass Number	210
G-Factor	0.73 ± 0.0083333333333333
Half Life	3.18 ± 0.06 m
Spin	6
Quadrupole Moment	0.21 ± 0.02
Discovery Year	1964
Parity	+

²¹⁰Fr Decay Modes

Decay Mode	Intensity
α (α emission)	71%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²¹¹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	210.995555189 ± 0.000012872 Da
Mass Number	211
G-Factor	0.88222222222222 ± 0.011111111111111
Half Life	3.1 ± 0.02 m
Spin	9/2
Quadrupole Moment	-0.21 ± 0.02
Discovery Year	1964
Parity	-

²¹¹Fr Decay Modes

Decay Mode	Intensity
α (α emission)	87%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	13%

²¹²Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	211.99622542 ± 0.000009419 Da
Mass Number	212
G-Factor	0.918 ± 0.01
Half Life	20 ± 0.6 m
Spin	5
Quadrupole Moment	-0.1 ± 0.002
Discovery Year	1950
Parity	+

²¹²Fr Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	57%
α (α emission)	43%

²¹³Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	212.99618441 ± 0.000005053 Da
Mass Number	213
G-Factor	0.88666666666667 ± 0.0022222222222222
Half Life	34.14 ± 0.06 s
Spin	9/2
Quadrupole Moment	-0.138 ± 0.003
Discovery Year	1964
Parity	-

²¹³Fr Decay Modes

Decay Mode	Intensity
α (α emission)	99.44%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.56%

²¹⁴Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	213.998971193 ± 0.000009145 Da
Mass Number	214
G-Factor	0.241 ± 0.016
Half Life	5.51 ± 0.13 ms
Spin	1
Quadrupole Moment
Discovery Year	1967
Parity	-

²¹⁴Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁵Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	215.000341534 ± 0.000007585 Da
Mass Number	215
G-Factor
Half Life	90 ± 4 ns
Spin	9/2
Quadrupole Moment
Discovery Year	1970
Parity	-

²¹⁵Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁶Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	216.003189523 ± 0.00000448 Da
Mass Number	216
G-Factor
Half Life	700 ± 20 ns
Spin	1
Quadrupole Moment
Discovery Year	1970
Parity	-

²¹⁶Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²¹⁷Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	217.00463198 ± 0.000007011 Da
Mass Number	217
G-Factor
Half Life	22 ± 5 us
Spin	9/2
Quadrupole Moment
Discovery Year	1968
Parity	-

²¹⁷Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁸Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	218.00757862 ± 0.000004546 Da
Mass Number	218
G-Factor
Half Life	1.4 ± 0.5 ms
Spin	1
Quadrupole Moment
Discovery Year	1949
Parity	-

²¹⁸Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	219.009250664 ± 0.00000738 Da
Mass Number	219
G-Factor
Half Life	22.5 ± 1.7 ms
Spin	9/2
Quadrupole Moment	-1.19 ± 0.02
Discovery Year	1948
Parity	-

²¹⁹Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²²⁰Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	220.012326789 ± 0.000004324 Da
Mass Number	220
G-Factor	-0.66 ± 0.01
Half Life	27.4 ± 0.3 s
Spin	1
Quadrupole Moment	0.487 ± 0.008
Discovery Year	1948
Parity	+

²²⁰Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁻ (β⁻ decay)	0.35%

²²¹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	221.014253714 ± 0.000005245 Da
Mass Number	221
G-Factor	0.628 ± 0.008
Half Life	4.801 ± 0.005 m
Spin	5/2
Quadrupole Moment	-1.02 ± 0.03
Discovery Year	1947
Parity	-

²²¹Fr Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁻ (β⁻ decay)	0.0048%
14C	8.8%

²²²Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	222.017582615 ± 0.000008 Da
Mass Number	222
G-Factor	0.315 ± 0.005
Half Life	14.2 ± 0.3 m
Spin	2
Quadrupole Moment	0.51 ± 0.04
Discovery Year	1975
Parity	-

²²²Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²³Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	223.019734241 ± 0.000002073 Da
Mass Number	223
G-Factor	0.77333333333333 ± 0.0066666666666667
Half Life	22 ± 0.07 m
Spin	3/2
Quadrupole Moment	1.18 ± 0.02
Discovery Year	1939
Parity	-

²²³Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
α (α emission)	0.006%

²²⁴Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	224.023348096 ± 0.000012 Da
Mass Number	224
G-Factor	0.4 ± 0.01
Half Life	3.33 ± 0.1 m
Spin	1
Quadrupole Moment	0.523 ± 0.009
Discovery Year	1969
Parity	-

²²⁴Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²⁵Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	225.025572466 ± 0.000012847 Da
Mass Number	225
G-Factor	0.70666666666667 ± 0.0066666666666667
Half Life	3.95 ± 0.14 m
Spin	3/2
Quadrupole Moment	1.33 ± 0.02
Discovery Year	1969
Parity	-

²²⁵Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²⁶Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	226.029544512 ± 0.000006688 Da
Mass Number	226
G-Factor	0.0712 ± 0.0014
Half Life	48.5 ± 0.7 s
Spin	1
Quadrupole Moment	-1.37 ± 0.03
Discovery Year	1969
Parity	-

²²⁶Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²⁷Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	227.031865413 ± 0.000006332 Da
Mass Number	227
G-Factor	2.98 ± 0.04
Half Life	2.47 ± 0.03 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1972
Parity	+

²²⁷Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²⁸Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	228.035839433 ± 0.000007226 Da
Mass Number	228
G-Factor	-0.38 ± 0.005
Half Life	38 ± 1 s
Spin	2
Quadrupole Moment	2.41 ± 0.06
Discovery Year	1972
Parity	-

²²⁸Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²⁹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	229.038291443 ± 0.000005368 Da
Mass Number	229
G-Factor
Half Life	50.2 ± 0.4 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1975
Parity	+

²²⁹Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²³⁰Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	230.042390787 ± 0.000007022 Da
Mass Number	230
G-Factor
Half Life	19.1 ± 0.5 s
Spin	2
Quadrupole Moment
Discovery Year	1987
Parity	+

²³⁰Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²³¹Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	231.045175353 ± 0.0000083 Da
Mass Number	231
G-Factor
Half Life	17.6 ± 0.6 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1985
Parity	+

²³¹Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²³²Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	232.049461219 ± 0.000015 Da
Mass Number	232
G-Factor
Half Life	5.5 ± 0.6 s
Spin	5
Quadrupole Moment
Discovery Year	1990
Parity

²³²Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)	%

²³³Fr

Abundance	Radioactive ☢️
Relative Atomic Mass	233.052517833 ± 0.000021 Da
Mass Number	233
G-Factor
Half Life	900 ± 100 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	2010
Parity	+

²³³Fr Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

History

Francium was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris, France. It was discovered when she was researching the radioactive decay of actinium-227. Marguerite Perey discovered that francium-223 is made naturally when actinium-227 emits an alpha-particle. Francium was named after France

Discoverers	Marguerite Derey
Discovery Location	France
Discovery Year	1939
Etymology (Name Origin)	Named for France, the nation of its discovery.
Pronunciation	FRAN-si-em (English)

Francium is highly radioactive

Francium was the last element discovered in nature, rather than by synthesis

Uses

Due to its instability and rarity, there are no commercial applications for francium. It has been used for research purposes in the fields of biology and of atomic structure. Its use as a potential diagnostic aid for various cancers has also been explored, but this application has been deemed impractical. Since its isotopes have such short half-lives there are no commercially significant compounds of francium.

Sources

Formed by decay of actinium. Chemical properties similar to cesium. Decays to radium or astatine.

Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body	0 %
Abundance in Meteor
Abundance in Sun
Abundance in Universe	0 %

Nuclear Screening Constants

Francium on ChemicalAid

Australian Educational Vocabulary ID	scot/3521
Brockhaus Enzyklopädie online ID	francium
CAS Registry Number	7440-73-5
ChEBI ID	33323
ChemSpider ID	4886484
DSSTOX compound identifier	DTXCID20147885
DSSTox substance ID	DTXSID20225394
Den Store Danske ID	francium
Elhuyar ZTH ID	024312
Encyclopædia Britannica Online ID	science/francium
Encyclopædia Universalis ID	francium
Freebase ID	/m/025rqcb
French Vikidia ID	Francium
GND ID	4155153-9
Gran Enciclopèdia Catalana ID	0110219
Gran Enciclopèdia Catalana ID	0027925
Great Russian Encyclopedia Online ID	4735985
InChI	InChI=1S/Fr
InChIKey	KLMCZVJOEAUDNE-UHFFFAOYSA-N
KBpedia ID	Francium
Library of Congress authority ID	sh85051541
MeSH descriptor ID	D005605
NE.se ID	francium
National Library of Israel J9U ID	987007550763805171
OmegaWiki Defined Meaning	159016
PSH ID	5749
PubChem CID	6328145
Quora topic ID	Francium
Store norske leksikon ID	francium
Treccani ID	francio
UNII	15TEQ7D2QF
WordNet 3.1 Synset ID	14662042-n

Francium (Fr)

Properties

Isotopes of Francium

197Fr

197Fr Decay Modes

198Fr

198Fr Decay Modes

199Fr

199Fr Decay Modes

200Fr

200Fr Decay Modes

201Fr

201Fr Decay Modes

202Fr

202Fr Decay Modes

203Fr

203Fr Decay Modes

204Fr

204Fr Decay Modes

205Fr

205Fr Decay Modes

206Fr

206Fr Decay Modes

207Fr

207Fr Decay Modes

208Fr

208Fr Decay Modes

209Fr

209Fr Decay Modes

210Fr

210Fr Decay Modes

211Fr

211Fr Decay Modes

212Fr

212Fr Decay Modes

213Fr

213Fr Decay Modes

214Fr

214Fr Decay Modes

215Fr

215Fr Decay Modes

216Fr

216Fr Decay Modes

217Fr

217Fr Decay Modes

218Fr

218Fr Decay Modes

219Fr

219Fr Decay Modes

220Fr

220Fr Decay Modes

221Fr

221Fr Decay Modes

222Fr

222Fr Decay Modes

223Fr

223Fr Decay Modes

224Fr

224Fr Decay Modes

225Fr

225Fr Decay Modes

226Fr

226Fr Decay Modes

227Fr

227Fr Decay Modes

228Fr

228Fr Decay Modes

229Fr

229Fr Decay Modes

230Fr

230Fr Decay Modes

231Fr

231Fr Decay Modes

232Fr

232Fr Decay Modes

233Fr

233Fr Decay Modes