Fransi (Fr)

chemical element with symbol Fr and atomic number 87

Atomic Number	87
Atomic Weight	223
mass number	197

Group	1
Period	7
Block	s

protoni	87 p⁺
nyutroni	110 n⁰
elektroni	87 e^-

Physical Property

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
msongamano	1.87 g/cm³

Chemical Property

nishati

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

enthalpy of vaporization
enthalpy of fusion	15 kJ/mol
standard enthalpy of formation
elektroni

Mzingo elektroni	2, 8, 18, 32, 18, 8, 1

valence electron	1 ⓘ

electron configuration	[Rn] 7s¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s¹

oxidation number	1
electronegativity	0.08731 0.7
Electrophilicity Index	0.7242688826969913 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point
Melting Point	294.15 K
critical pressure
critical temperature
Kiwango utatu
appearance
Rangi	Silver #ffffff #420066 #420066
appearance
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
Uga sumaku
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's 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 classification	synthetic

other

Gas Basicity
polarizability	317.8 ± 2.4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number	2S1/2
space group	()

Isotopes of Francium

Stable Isotopes	0
Unstable Isotopes	37
Natural Isotopes	0

¹⁹⁷Fr

mass number	197
neutron number	110
Relative Atomic Mass	197.011008086 ± 0.000060584 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	2.3 ± 1.9 ms
spin	7/2
nuclear quadrupole moment
Uvumbuzi	2013
parity	-

hali ya kuoza	intensity
α (α emission)	100%

¹⁹⁸Fr

mass number	198
neutron number	111
Relative Atomic Mass	198.010282081 ± 0.000033419 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	15 ± 3 ms
spin	3
nuclear quadrupole moment
Uvumbuzi	2013
parity	+

hali ya kuoza	intensity
α (α emission)	100%

¹⁹⁹Fr

mass number	199
neutron number	112
Relative Atomic Mass	199.007269384 ± 0.000014734 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	6.6 ± 2.2 ms
spin	1/2
nuclear quadrupole moment	0
Uvumbuzi	1999
parity	+

hali ya kuoza	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰⁰Fr

mass number	200
neutron number	113
Relative Atomic Mass	200.006584666 ± 0.000032769 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	47.5 ± 2.8 ms
spin	3
nuclear quadrupole moment
Uvumbuzi	1995
parity	+

hali ya kuoza	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ SF (β⁺-delayed fission)

²⁰¹Fr

mass number	201
neutron number	114
Relative Atomic Mass	201.003852491 ± 0.000009747 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	62.8 ± 1.9 ms
spin	9/2
nuclear quadrupole moment
Uvumbuzi	1980
parity	-

hali ya kuoza	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰²Fr

mass number	202
neutron number	115
Relative Atomic Mass	202.003329637 ± 0.000006476 Da
g-factor	1.3 ± 0.016666666666667
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	372 ± 12 ms
spin	3
nuclear quadrupole moment
Uvumbuzi	1980
parity	+

hali ya kuoza	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰³Fr

mass number	203
neutron number	116
Relative Atomic Mass	203.000940867 ± 0.000006689 Da
g-factor	0.83111111111111 ± 0.0088888888888889
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	550 ± 10 ms
spin	9/2
nuclear quadrupole moment	-0.47 ± 0.02
Uvumbuzi	1967
parity	-

hali ya kuoza	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰⁴Fr

mass number	204
neutron number	117
Relative Atomic Mass	204.000651972 ± 0.000026389 Da
g-factor	1.33 ± 0.01
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.75 ± 0.26 s
spin	3
nuclear quadrupole moment	-0.141 ± 0.009
Uvumbuzi	1964
parity	+

hali ya kuoza	intensity
α (α emission)	96%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰⁵Fr

mass number	205
neutron number	118
Relative Atomic Mass	204.998593854 ± 0.000008399 Da
g-factor	0.84444444444444 ± 0.0066666666666667
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.9 ± 0.07 s
spin	9/2
nuclear quadrupole moment	-0.305 ± 0.018
Uvumbuzi	1964
parity	-

hali ya kuoza	intensity
α (α emission)	98.5%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	1.5%

²⁰⁶Fr

mass number	206
neutron number	119
Relative Atomic Mass	205.998661441 ± 0.000029856 Da
g-factor	1.3233333333333 ± 0.016666666666667
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha
spin	3
nuclear quadrupole moment	-0.354 ± 0.009
Uvumbuzi	1964
parity	+

hali ya kuoza	intensity
α (α emission)	88.4%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11.6%

²⁰⁷Fr

mass number	207
neutron number	120
Relative Atomic Mass	206.99694145 ± 0.000018847 Da
g-factor	0.86 ± 0.0088888888888889
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	14.8 ± 0.1 s
spin	9/2
nuclear quadrupole moment	-0.24 ± 0.02
Uvumbuzi	1964
parity	-

hali ya kuoza	intensity
α (α emission)	95%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰⁸Fr

mass number	208
neutron number	121
Relative Atomic Mass	207.997139082 ± 0.000012514 Da
g-factor	0.67285714285714 ± 0.0057142857142857
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	59.1 ± 0.3 s
spin	7
nuclear quadrupole moment	0.052 ± 0.011
Uvumbuzi	1964
parity	+

hali ya kuoza	intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11%

²⁰⁹Fr

mass number	209
neutron number	122
Relative Atomic Mass	208.995939701 ± 0.000012349 Da
g-factor	0.87333333333333 ± 0.011111111111111
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	50.5 ± 0.7 s
spin	9/2
nuclear quadrupole moment	-0.26 ± 0.02
Uvumbuzi	1964
parity	-

hali ya kuoza	intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11%

²¹⁰Fr

mass number	210
neutron number	123
Relative Atomic Mass	209.996410596 ± 0.000014407 Da
g-factor	0.73 ± 0.0083333333333333
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.18 ± 0.06 m
spin	6
nuclear quadrupole moment	0.21 ± 0.02
Uvumbuzi	1964
parity	+

hali ya kuoza	intensity
α (α emission)	71%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²¹¹Fr

mass number	211
neutron number	124
Relative Atomic Mass	210.995555189 ± 0.000012872 Da
g-factor	0.88222222222222 ± 0.011111111111111
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.1 ± 0.02 m
spin	9/2
nuclear quadrupole moment	-0.21 ± 0.02
Uvumbuzi	1964
parity	-

hali ya kuoza	intensity
α (α emission)	87%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	13%

²¹²Fr

mass number	212
neutron number	125
Relative Atomic Mass	211.99622542 ± 0.000009419 Da
g-factor	0.918 ± 0.01
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	20 ± 0.6 m
spin	5
nuclear quadrupole moment	-0.1 ± 0.002
Uvumbuzi	1950
parity	+

hali ya kuoza	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	57%
α (α emission)	43%

²¹³Fr

mass number	213
neutron number	126
Relative Atomic Mass	212.99618441 ± 0.000005053 Da
g-factor	0.88666666666667 ± 0.0022222222222222
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	34.14 ± 0.06 s
spin	9/2
nuclear quadrupole moment	-0.138 ± 0.003
Uvumbuzi	1964
parity	-

hali ya kuoza	intensity
α (α emission)	99.44%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.56%

²¹⁴Fr

mass number	214
neutron number	127
Relative Atomic Mass	213.998971193 ± 0.000009145 Da
g-factor	0.241 ± 0.016
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	5.51 ± 0.13 ms
spin	1
nuclear quadrupole moment
Uvumbuzi	1967
parity	-

hali ya kuoza	intensity
α (α emission)	100%

²¹⁵Fr

mass number	215
neutron number	128
Relative Atomic Mass	215.000341534 ± 0.000007585 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	90 ± 4 ns
spin	9/2
nuclear quadrupole moment
Uvumbuzi	1970
parity	-

hali ya kuoza	intensity
α (α emission)	100%

²¹⁶Fr

mass number	216
neutron number	129
Relative Atomic Mass	216.003189523 ± 0.00000448 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	700 ± 20 ns
spin	1
nuclear quadrupole moment
Uvumbuzi	1970
parity	-

hali ya kuoza	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²¹⁷Fr

mass number	217
neutron number	130
Relative Atomic Mass	217.00463198 ± 0.000007011 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	22 ± 5 us
spin	9/2
nuclear quadrupole moment
Uvumbuzi	1968
parity	-

hali ya kuoza	intensity
α (α emission)	100%

²¹⁸Fr

mass number	218
neutron number	131
Relative Atomic Mass	218.00757862 ± 0.000004546 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.4 ± 0.5 ms
spin	1
nuclear quadrupole moment
Uvumbuzi	1949
parity	-

hali ya kuoza	intensity
α (α emission)	100%

²¹⁹Fr

mass number	219
neutron number	132
Relative Atomic Mass	219.009250664 ± 0.00000738 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	22.5 ± 1.7 ms
spin	9/2
nuclear quadrupole moment	-1.19 ± 0.02
Uvumbuzi	1948
parity	-

hali ya kuoza	intensity
α (α emission)	100%

²²⁰Fr

mass number	220
neutron number	133
Relative Atomic Mass	220.012326789 ± 0.000004324 Da
g-factor	-0.66 ± 0.01
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	27.4 ± 0.3 s
spin	1
nuclear quadrupole moment	0.487 ± 0.008
Uvumbuzi	1948
parity	+

hali ya kuoza	intensity
α (α emission)	100%
β⁻ (β⁻ decay)	0.35%

²²¹Fr

mass number	221
neutron number	134
Relative Atomic Mass	221.014253714 ± 0.000005245 Da
g-factor	0.628 ± 0.008
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	4.801 ± 0.005 m
spin	5/2
nuclear quadrupole moment	-1.02 ± 0.03
Uvumbuzi	1947
parity	-

hali ya kuoza	intensity
α (α emission)	100%
β⁻ (β⁻ decay)	0.0048%
14C	8.8%

²²²Fr

mass number	222
neutron number	135
Relative Atomic Mass	222.017582615 ± 0.000008 Da
g-factor	0.315 ± 0.005
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	14.2 ± 0.3 m
spin	2
nuclear quadrupole moment	0.51 ± 0.04
Uvumbuzi	1975
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²²³Fr

mass number	223
neutron number	136
Relative Atomic Mass	223.019734241 ± 0.000002073 Da
g-factor	0.77333333333333 ± 0.0066666666666667
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	22 ± 0.07 m
spin	3/2
nuclear quadrupole moment	1.18 ± 0.02
Uvumbuzi	1939
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
α (α emission)	0.006%

²²⁴Fr

mass number	224
neutron number	137
Relative Atomic Mass	224.023348096 ± 0.000012 Da
g-factor	0.4 ± 0.01
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.33 ± 0.1 m
spin	1
nuclear quadrupole moment	0.523 ± 0.009
Uvumbuzi	1969
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²²⁵Fr

mass number	225
neutron number	138
Relative Atomic Mass	225.025572466 ± 0.000012847 Da
g-factor	0.70666666666667 ± 0.0066666666666667
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.95 ± 0.14 m
spin	3/2
nuclear quadrupole moment	1.33 ± 0.02
Uvumbuzi	1969
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²²⁶Fr

mass number	226
neutron number	139
Relative Atomic Mass	226.029544512 ± 0.000006688 Da
g-factor	0.0712 ± 0.0014
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	48.5 ± 0.7 s
spin	1
nuclear quadrupole moment	-1.37 ± 0.03
Uvumbuzi	1969
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²²⁷Fr

mass number	227
neutron number	140
Relative Atomic Mass	227.031865413 ± 0.000006332 Da
g-factor	2.98 ± 0.04
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	2.47 ± 0.03 m
spin	1/2
nuclear quadrupole moment	0
Uvumbuzi	1972
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²²⁸Fr

mass number	228
neutron number	141
Relative Atomic Mass	228.035839433 ± 0.000007226 Da
g-factor	-0.38 ± 0.005
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	38 ± 1 s
spin	2
nuclear quadrupole moment	2.41 ± 0.06
Uvumbuzi	1972
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²²⁹Fr

mass number	229
neutron number	142
Relative Atomic Mass	229.038291443 ± 0.000005368 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	50.2 ± 0.4 s
spin	1/2
nuclear quadrupole moment	0
Uvumbuzi	1975
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²³⁰Fr

mass number	230
neutron number	143
Relative Atomic Mass	230.042390787 ± 0.000007022 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	19.1 ± 0.5 s
spin	2
nuclear quadrupole moment
Uvumbuzi	1987
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²³¹Fr

mass number	231
neutron number	144
Relative Atomic Mass	231.045175353 ± 0.0000083 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	17.6 ± 0.6 s
spin	1/2
nuclear quadrupole moment	0
Uvumbuzi	1985
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

²³²Fr

mass number	232
neutron number	145
Relative Atomic Mass	232.049461219 ± 0.000015 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	5.5 ± 0.6 s
spin	5
nuclear quadrupole moment
Uvumbuzi	1990
parity

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)

²³³Fr

mass number	233
neutron number	146
Relative Atomic Mass	233.052517833 ± 0.000021 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	900 ± 100 ms
spin	1/2
nuclear quadrupole moment	0
Uvumbuzi	2010
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

historia

mgunduzi au mvumbuzi	Marguerite Derey
location of discovery	France
Uvumbuzi	1939
Etimolojia	Named for France, the nation of its discovery.
pronunciation	FRAN-si-em (Kiingereza)

source

Abundance
Abundance in Earth's crust
natural abundance (Bahari)
natural abundance (Mwili)	0 %
natural abundance (Kimondo)
natural abundance (Jua)
Abundance in Universe	0 %

Nuclear Screening Constants

Fransi 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	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
USGS Thesaurus ID	1457
WordNet 3.1 Synset ID	14662042-n

Fransi (Fr)

Physical Property

Chemical Property

other

Isotopes of Francium

197Fr

198Fr

199Fr

200Fr

201Fr

202Fr

203Fr

204Fr

205Fr

206Fr

207Fr

208Fr

209Fr

210Fr

211Fr

212Fr

213Fr

214Fr

215Fr

216Fr

217Fr

218Fr

219Fr

220Fr

221Fr

222Fr

223Fr

224Fr

225Fr

226Fr

227Fr

228Fr

229Fr

230Fr

231Fr

232Fr

233Fr

historia

source

Nuclear Screening Constants

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