Francium (Fr)

grundstof med atomnummer 87

Atomnummer	87
Atommasse	223
mass number	197

Gruppe	1
Periode	7
Blok	s

proton	87 p⁺
neutron	110 n⁰
elektron	87 e^-

Animated Bohrs atommodel of Fr (Francium)

Fysisk Egenskab

Atomradius	258 pm
molar volume
Kovalent Radius	223 pm 218 pm 260 pm
Metallic Radius
Ionisk radius	180 pm
Crystal Radius	194 pm
Van der Waals-radius	348 pm 364 pm 348 pm 490 pm
massefylde	1,87 g/cm³

Kemisk Egenskab

energi

proton affinity
electron affinity	0,486 eV/particle
ioniseringsenergi	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

Fordampningsvarme
smeltevarme	15 kJ/mol
standard enthalpy of formation
elektron

Elektronskal	2, 8, 18, 32, 18, 8, 1

Valenselektron	1 ⓘ

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

Oxidationstrin	1
Elektronegativitet	0.08731 0.7
Electrophilicity Index	0,7242688826969913 eV/particle
fundamental state of matter

stoffase	Fast stof
gaseous state of matter
Kogepunkt
Smeltepunkt	294,15 K
critical pressure
critical temperature
trippelpunkt
appearance
farve	Silver #ffffff #420066 #420066
appearance
Brydningsindeks
materialeegenskab
Varmeledningsevne
Termisk ekspansion
molar heat capacity
Varmefylde
Adiabateksponenten
electrical properties
type
specifik ledningsevne
Elektrisk resistivitet
superledning
Magnetisme
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curietemperaturen
Néel temperature
struktur
Krystalstruktur	(BCC)
lattice constant
Lattice Angles
mechanical property
hårdhed
Kompressibilitetsmodul
Forskydningsmodul
E-modul
Poissons forhold
speed of sound
klassificering
Kategori	Alkalimetaller, 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

øvrige

Gas Basicity
polarizability	317,8 ± 2,4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number	2S1/2
rumgruppe	()

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
radioaktivitet	☢️ radioactive element
halveringstid	2,3 ± 1,9 ms
spin	7/2
nuclear quadrupole moment
opdagelsesdato	2013
Paritet	-

decay mode	Intensitet
α (α emission)	100%

¹⁹⁸Fr

mass number	198
neutron number	111
Relative Atomic Mass	198,010282081 ± 0,000033419 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	15 ± 3 ms
spin	3
nuclear quadrupole moment
opdagelsesdato	2013
Paritet	+

decay mode	Intensitet
α (α emission)	100%

¹⁹⁹Fr

mass number	199
neutron number	112
Relative Atomic Mass	199,007269384 ± 0,000014734 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	6,6 ± 2,2 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1999
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	47,5 ± 2,8 ms
spin	3
nuclear quadrupole moment
opdagelsesdato	1995
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	62,8 ± 1,9 ms
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1980
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	372 ± 12 ms
spin	3
nuclear quadrupole moment
opdagelsesdato	1980
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	550 ± 10 ms
spin	9/2
nuclear quadrupole moment	-0,47 ± 0,02
opdagelsesdato	1967
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	1,75 ± 0,26 s
spin	3
nuclear quadrupole moment	-0,141 ± 0,009
opdagelsesdato	1964
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	3,9 ± 0,07 s
spin	9/2
nuclear quadrupole moment	-0,305 ± 0,018
opdagelsesdato	1964
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid
spin	3
nuclear quadrupole moment	-0,354 ± 0,009
opdagelsesdato	1964
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	14,8 ± 0,1 s
spin	9/2
nuclear quadrupole moment	-0,24 ± 0,02
opdagelsesdato	1964
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	59,1 ± 0,3 s
spin	7
nuclear quadrupole moment	0,052 ± 0,011
opdagelsesdato	1964
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	50,5 ± 0,7 s
spin	9/2
nuclear quadrupole moment	-0,26 ± 0,02
opdagelsesdato	1964
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	3,18 ± 0,06 m
spin	6
nuclear quadrupole moment	0,21 ± 0,02
opdagelsesdato	1964
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	3,1 ± 0,02 m
spin	9/2
nuclear quadrupole moment	-0,21 ± 0,02
opdagelsesdato	1964
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	20 ± 0,6 m
spin	5
nuclear quadrupole moment	-0,1 ± 0,002
opdagelsesdato	1950
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	34,14 ± 0,06 s
spin	9/2
nuclear quadrupole moment	-0,138 ± 0,003
opdagelsesdato	1964
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	5,51 ± 0,13 ms
spin	1
nuclear quadrupole moment
opdagelsesdato	1967
Paritet	-

decay mode	Intensitet
α (α emission)	100%

²¹⁵Fr

mass number	215
neutron number	128
Relative Atomic Mass	215,000341534 ± 0,000007585 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	90 ± 4 ns
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1970
Paritet	-

decay mode	Intensitet
α (α emission)	100%

²¹⁶Fr

mass number	216
neutron number	129
Relative Atomic Mass	216,003189523 ± 0,00000448 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	700 ± 20 ns
spin	1
nuclear quadrupole moment
opdagelsesdato	1970
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	22 ± 5 us
spin	9/2
nuclear quadrupole moment
opdagelsesdato	1968
Paritet	-

decay mode	Intensitet
α (α emission)	100%

²¹⁸Fr

mass number	218
neutron number	131
Relative Atomic Mass	218,00757862 ± 0,000004546 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	1,4 ± 0,5 ms
spin	1
nuclear quadrupole moment
opdagelsesdato	1949
Paritet	-

decay mode	Intensitet
α (α emission)	100%

²¹⁹Fr

mass number	219
neutron number	132
Relative Atomic Mass	219,009250664 ± 0,00000738 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	22,5 ± 1,7 ms
spin	9/2
nuclear quadrupole moment	-1,19 ± 0,02
opdagelsesdato	1948
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	27,4 ± 0,3 s
spin	1
nuclear quadrupole moment	0,487 ± 0,008
opdagelsesdato	1948
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	4,801 ± 0,005 m
spin	5/2
nuclear quadrupole moment	-1,02 ± 0,03
opdagelsesdato	1947
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	14,2 ± 0,3 m
spin	2
nuclear quadrupole moment	0,51 ± 0,04
opdagelsesdato	1975
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	22 ± 0,07 m
spin	3/2
nuclear quadrupole moment	1,18 ± 0,02
opdagelsesdato	1939
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	3,33 ± 0,1 m
spin	1
nuclear quadrupole moment	0,523 ± 0,009
opdagelsesdato	1969
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	3,95 ± 0,14 m
spin	3/2
nuclear quadrupole moment	1,33 ± 0,02
opdagelsesdato	1969
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	48,5 ± 0,7 s
spin	1
nuclear quadrupole moment	-1,37 ± 0,03
opdagelsesdato	1969
Paritet	-

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	2,47 ± 0,03 m
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1972
Paritet	+

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	38 ± 1 s
spin	2
nuclear quadrupole moment	2,41 ± 0,06
opdagelsesdato	1972
Paritet	-

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

²²⁹Fr

mass number	229
neutron number	142
Relative Atomic Mass	229,038291443 ± 0,000005368 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	50,2 ± 0,4 s
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1975
Paritet	+

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

²³⁰Fr

mass number	230
neutron number	143
Relative Atomic Mass	230,042390787 ± 0,000007022 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	19,1 ± 0,5 s
spin	2
nuclear quadrupole moment
opdagelsesdato	1987
Paritet	+

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

²³¹Fr

mass number	231
neutron number	144
Relative Atomic Mass	231,045175353 ± 0,0000083 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	17,6 ± 0,6 s
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1985
Paritet	+

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

²³²Fr

mass number	232
neutron number	145
Relative Atomic Mass	232,049461219 ± 0,000015 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	5,5 ± 0,6 s
spin	5
nuclear quadrupole moment
opdagelsesdato	1990
Paritet

decay mode	Intensitet
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
radioaktivitet	☢️ radioactive element
halveringstid	900 ± 100 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	2010
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

historie

opdager eller opfinder	Marguerite Derey
fundsted	France
opdagelsesdato	1939
etymologi	Named for France, the nation of its discovery.
udtale	FRAN-si-em (engelsk)

source

Forekomst
Abundance in Earth's crust
natural abundance (verdenshave)
natural abundance (menneskelige krop)	0 %
natural abundance (Meteoroid)
natural abundance (Solen)
Abundance in Universe	0 %

Nuclear Screening Constants

Francium on ChemicalAid

Australian Educational Vocabulary ID	scot/3521
Brockhaus Enzyklopädie online ID	francium
CAS-nummer	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
Enciclopedia Treccani	francio
Encyclopædia Britannica Online-ID	science/francium
Encyclopædia Universalis-ID	francium
Freebase-ID	/m/025rqcb
French Vikidia ID	Francium
GND-identifikator	4155153-9
InChI	InChI=1S/Fr
InChIKey	KLMCZVJOEAUDNE-UHFFFAOYSA-N
KBpedia ID	Francium
LCAuth	sh85051541
MeSH ID	D005605
NE.se ID	francium
National Library of Israel J9U ID	987007550763805171
OmegaWiki-betydningsdefinition	159016
PSH-ID	5749
PubChem CID	6328145
Quora emne-ID	Francium
Store katalanske encyklopædi-ID	0110219
Store katalanske encyklopædi-ID	0027925
Store norske leksikon-ID	francium
Store russiske encyklopædi Online-ID	4735985
UNII	15TEQ7D2QF
USGS Thesaurus ID	1457
WordNet 3.1 Synset ID	14662042-n

Francium (Fr)

Fysisk Egenskab

Kemisk Egenskab

øvrige

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

historie

source

Nuclear Screening Constants

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