Franci

Franci (Fr)

chemical element with symbol Fr and atomic number 87
Atomic Number87
Atomic Weight223
Rhif màs197
Group1
Period7
Blocks
Proton87 p+
Niwtron110 n0
Electron87 e-
Animated Bohr model of Fr (Franci)

Nodwedd Ffisegol

Atomic Radius
molar volume
covalent radius
223 pm
Metallic Radius
ionic radius
180 pm
Crystal Radius
194 pm
Van der Waals radius
348 pm
density
1.87 g/cm³

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
4.0727409 eV/particle
ionization energy of Fr (Franci)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Electron
plisgyn yr electron2, 8, 18, 32, 18, 8, 1
Bohr model: Fr (Franci)
valence electron1
Lewis structure: Fr (Franci)
trefn yr electronnau[Rn] 7s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s1
Enhanced Bohr model of Fr (Franci)
Orbital Diagram of Fr (Franci)
Cyflwr ocsidiad1
Electronegatifedd
0.7
Electrophilicity Index
0.7242688826969913 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
Melting Point
294.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearance
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
dargludedd trydanol
Gwrthedd
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal Structure (BCC)
lattice constant
Lattice Angles
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryAlkali metals, Alkali metals
CAS GroupIA
IUPAC GroupIA
Glawe Number7
Mendeleev Number6
Pettifor Number7
Geochemical ClassU/Th decay series
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
317.8 ± 2.4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number2S1/2
space group ()

Isotopes of Francium

Stable Isotopes0
Unstable Isotopes37
Natural Isotopes0

197Fr

Rhif màs197
neutron number110
relative atomic mass
197.011008086 ± 0.000060584 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.3 ± 1.9 ms
spin7/2
nuclear quadrupole moment
dyddiad darganfod2013
parity-

decay modeintensity
α (α emission)100%

198Fr

Rhif màs198
neutron number111
relative atomic mass
198.010282081 ± 0.000033419 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
15 ± 3 ms
spin3
nuclear quadrupole moment
dyddiad darganfod2013
parity+

decay modeintensity
α (α emission)100%

199Fr

Rhif màs199
neutron number112
relative atomic mass
199.007269384 ± 0.000014734 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.6 ± 2.2 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1999
parity+

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

200Fr

Rhif màs200
neutron number113
relative atomic mass
200.006584666 ± 0.000032769 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
47.5 ± 2.8 ms
spin3
nuclear quadrupole moment
dyddiad darganfod1995
parity+

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

201Fr

Rhif màs201
neutron number114
relative atomic mass
201.003852491 ± 0.000009747 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
62.8 ± 1.9 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1980
parity-

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

202Fr

Rhif màs202
neutron number115
relative atomic mass
202.003329637 ± 0.000006476 Da
g-factor
1.3 ± 0.016666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
372 ± 12 ms
spin3
nuclear quadrupole moment
dyddiad darganfod1980
parity+

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

203Fr

Rhif màs203
neutron number116
relative atomic mass
203.000940867 ± 0.000006689 Da
g-factor
0.83111111111111 ± 0.0088888888888889
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
550 ± 10 ms
spin9/2
nuclear quadrupole moment
-0.47 ± 0.02
dyddiad darganfod1967
parity-

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

204Fr

Rhif màs204
neutron number117
relative atomic mass
204.000651972 ± 0.000026389 Da
g-factor
1.33 ± 0.01
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.75 ± 0.26 s
spin3
nuclear quadrupole moment
-0.141 ± 0.009
dyddiad darganfod1964
parity+

decay modeintensity
α (α emission)96%
β+ (β+ decay; β+ = ϵ + e+)

205Fr

Rhif màs205
neutron number118
relative atomic mass
204.998593854 ± 0.000008399 Da
g-factor
0.84444444444444 ± 0.0066666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.9 ± 0.07 s
spin9/2
nuclear quadrupole moment
-0.305 ± 0.018
dyddiad darganfod1964
parity-

decay modeintensity
α (α emission)98.5%
β+ (β+ decay; β+ = ϵ + e+)1.5%

206Fr

Rhif màs206
neutron number119
relative atomic mass
205.998661441 ± 0.000029856 Da
g-factor
1.3233333333333 ± 0.016666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3
nuclear quadrupole moment
-0.354 ± 0.009
dyddiad darganfod1964
parity+

decay modeintensity
α (α emission)88.4%
β+ (β+ decay; β+ = ϵ + e+)11.6%

207Fr

Rhif màs207
neutron number120
relative atomic mass
206.99694145 ± 0.000018847 Da
g-factor
0.86 ± 0.0088888888888889
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
14.8 ± 0.1 s
spin9/2
nuclear quadrupole moment
-0.24 ± 0.02
dyddiad darganfod1964
parity-

decay modeintensity
α (α emission)95%
β+ (β+ decay; β+ = ϵ + e+)

208Fr

Rhif màs208
neutron number121
relative atomic mass
207.997139082 ± 0.000012514 Da
g-factor
0.67285714285714 ± 0.0057142857142857
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
59.1 ± 0.3 s
spin7
nuclear quadrupole moment
0.052 ± 0.011
dyddiad darganfod1964
parity+

decay modeintensity
α (α emission)89%
β+ (β+ decay; β+ = ϵ + e+)11%

209Fr

Rhif màs209
neutron number122
relative atomic mass
208.995939701 ± 0.000012349 Da
g-factor
0.87333333333333 ± 0.011111111111111
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
50.5 ± 0.7 s
spin9/2
nuclear quadrupole moment
-0.26 ± 0.02
dyddiad darganfod1964
parity-

decay modeintensity
α (α emission)89%
β+ (β+ decay; β+ = ϵ + e+)11%

210Fr

Rhif màs210
neutron number123
relative atomic mass
209.996410596 ± 0.000014407 Da
g-factor
0.73 ± 0.0083333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.18 ± 0.06 m
spin6
nuclear quadrupole moment
0.21 ± 0.02
dyddiad darganfod1964
parity+

decay modeintensity
α (α emission)71%
β+ (β+ decay; β+ = ϵ + e+)

211Fr

Rhif màs211
neutron number124
relative atomic mass
210.995555189 ± 0.000012872 Da
g-factor
0.88222222222222 ± 0.011111111111111
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.1 ± 0.02 m
spin9/2
nuclear quadrupole moment
-0.21 ± 0.02
dyddiad darganfod1964
parity-

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

212Fr

Rhif màs212
neutron number125
relative atomic mass
211.99622542 ± 0.000009419 Da
g-factor
0.918 ± 0.01
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
20 ± 0.6 m
spin5
nuclear quadrupole moment
-0.1 ± 0.002
dyddiad darganfod1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)57%
α (α emission)43%

213Fr

Rhif màs213
neutron number126
relative atomic mass
212.99618441 ± 0.000005053 Da
g-factor
0.88666666666667 ± 0.0022222222222222
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
34.14 ± 0.06 s
spin9/2
nuclear quadrupole moment
-0.138 ± 0.003
dyddiad darganfod1964
parity-

decay modeintensity
α (α emission)99.44%
β+ (β+ decay; β+ = ϵ + e+)0.56%

214Fr

Rhif màs214
neutron number127
relative atomic mass
213.998971193 ± 0.000009145 Da
g-factor
0.241 ± 0.016
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.51 ± 0.13 ms
spin1
nuclear quadrupole moment
dyddiad darganfod1967
parity-

decay modeintensity
α (α emission)100%

215Fr

Rhif màs215
neutron number128
relative atomic mass
215.000341534 ± 0.000007585 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
90 ± 4 ns
spin9/2
nuclear quadrupole moment
dyddiad darganfod1970
parity-

decay modeintensity
α (α emission)100%

216Fr

Rhif màs216
neutron number129
relative atomic mass
216.003189523 ± 0.00000448 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
700 ± 20 ns
spin1
nuclear quadrupole moment
dyddiad darganfod1970
parity-

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

217Fr

Rhif màs217
neutron number130
relative atomic mass
217.00463198 ± 0.000007011 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
22 ± 5 us
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
α (α emission)100%

218Fr

Rhif màs218
neutron number131
relative atomic mass
218.00757862 ± 0.000004546 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.4 ± 0.5 ms
spin1
nuclear quadrupole moment
dyddiad darganfod1949
parity-

decay modeintensity
α (α emission)100%

219Fr

Rhif màs219
neutron number132
relative atomic mass
219.009250664 ± 0.00000738 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
22.5 ± 1.7 ms
spin9/2
nuclear quadrupole moment
-1.19 ± 0.02
dyddiad darganfod1948
parity-

decay modeintensity
α (α emission)100%

220Fr

Rhif màs220
neutron number133
relative atomic mass
220.012326789 ± 0.000004324 Da
g-factor
-0.66 ± 0.01
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
27.4 ± 0.3 s
spin1
nuclear quadrupole moment
0.487 ± 0.008
dyddiad darganfod1948
parity+

decay modeintensity
α (α emission)100%
β (β decay)0.35%

221Fr

Rhif màs221
neutron number134
relative atomic mass
221.014253714 ± 0.000005245 Da
g-factor
0.628 ± 0.008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.801 ± 0.005 m
spin5/2
nuclear quadrupole moment
-1.02 ± 0.03
dyddiad darganfod1947
parity-

decay modeintensity
α (α emission)100%
β (β decay)0.0048%
14C8.8%

222Fr

Rhif màs222
neutron number135
relative atomic mass
222.017582615 ± 0.000008 Da
g-factor
0.315 ± 0.005
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
14.2 ± 0.3 m
spin2
nuclear quadrupole moment
0.51 ± 0.04
dyddiad darganfod1975
parity-

decay modeintensity
β (β decay)100%

223Fr

Rhif màs223
neutron number136
relative atomic mass
223.019734241 ± 0.000002073 Da
g-factor
0.77333333333333 ± 0.0066666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
22 ± 0.07 m
spin3/2
nuclear quadrupole moment
1.18 ± 0.02
dyddiad darganfod1939
parity-

decay modeintensity
β (β decay)100%
α (α emission)0.006%

224Fr

Rhif màs224
neutron number137
relative atomic mass
224.023348096 ± 0.000012 Da
g-factor
0.4 ± 0.01
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.33 ± 0.1 m
spin1
nuclear quadrupole moment
0.523 ± 0.009
dyddiad darganfod1969
parity-

decay modeintensity
β (β decay)100%

225Fr

Rhif màs225
neutron number138
relative atomic mass
225.025572466 ± 0.000012847 Da
g-factor
0.70666666666667 ± 0.0066666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.95 ± 0.14 m
spin3/2
nuclear quadrupole moment
1.33 ± 0.02
dyddiad darganfod1969
parity-

decay modeintensity
β (β decay)100%

226Fr

Rhif màs226
neutron number139
relative atomic mass
226.029544512 ± 0.000006688 Da
g-factor
0.0712 ± 0.0014
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
48.5 ± 0.7 s
spin1
nuclear quadrupole moment
-1.37 ± 0.03
dyddiad darganfod1969
parity-

decay modeintensity
β (β decay)100%

227Fr

Rhif màs227
neutron number140
relative atomic mass
227.031865413 ± 0.000006332 Da
g-factor
2.98 ± 0.04
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.47 ± 0.03 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1972
parity+

decay modeintensity
β (β decay)100%

228Fr

Rhif màs228
neutron number141
relative atomic mass
228.035839433 ± 0.000007226 Da
g-factor
-0.38 ± 0.005
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
38 ± 1 s
spin2
nuclear quadrupole moment
2.41 ± 0.06
dyddiad darganfod1972
parity-

decay modeintensity
β (β decay)100%

229Fr

Rhif màs229
neutron number142
relative atomic mass
229.038291443 ± 0.000005368 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
50.2 ± 0.4 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1975
parity+

decay modeintensity
β (β decay)100%

230Fr

Rhif màs230
neutron number143
relative atomic mass
230.042390787 ± 0.000007022 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
19.1 ± 0.5 s
spin2
nuclear quadrupole moment
dyddiad darganfod1987
parity+

decay modeintensity
β (β decay)100%

231Fr

Rhif màs231
neutron number144
relative atomic mass
231.045175353 ± 0.0000083 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.6 ± 0.6 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1985
parity+

decay modeintensity
β (β decay)100%

232Fr

Rhif màs232
neutron number145
relative atomic mass
232.049461219 ± 0.000015 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.5 ± 0.6 s
spin5
nuclear quadrupole moment
dyddiad darganfod1990
parity

decay modeintensity
β (β decay)100%
β SF (β-delayed fission)

233Fr

Rhif màs233
neutron number146
relative atomic mass
233.052517833 ± 0.000021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
900 ± 100 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
Electron shell 087 francium

hanes

darganfyddwr neu ddyfeisiwrMarguerite Derey
man darganfodFrance
dyddiad darganfod1939
geirdarddiadNamed for France, the nation of its discovery.
ynganiadFRAN-si-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
natural abundance (corff dynol)
0 %
natural abundance (Awyrfaen)
natural abundance (Haul)
Abundance in Universe
0 %

Nuclear Screening Constants