Francium Element (Periodic Table)

Francium

Francium (Fr) is a chemical element of the periodic table, located in group 1 and period 7, and has the atomic number 87. This element is named after France, the homeland of the discoverer Marguerite Perey. It is the heaviest chemical element of group 1 and the second most electropositive element. Francium, counted as one of the radioactive elements, is the second rarest element, after the astatine element.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6
55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
– s block

Francium Applications (or Uses)

Here are the applications (or uses) of francium:

  • Francium has no use because it is so rare and unstable
  • Francium has been used for research work in the field of chemistry

Francium Facts

Here are the facts about francium:

  • Francium has a half-life of only 22 minutes
  • Francium was referred to as eka-caesium before its discovery
  • Francium is never found in bulk, and it is available only about 30 grams on earth
  • Francium is the second most electropositive element
  • Francium has only two naturally occurring isotopes: 221Fr and 223Fr
  • Francium was discovered last among all naturally occurring elements (in the year 1939)

FAQs on Francium Element

Francium
‣ Who discovered francium?

Discovery and first isolation: Marguerite Perey (1939)
‣ Where is francium located on the periodic table?

Francium Periodic Table

Location: Francium is found in the first column of the periodic table below the caesium element.
‣ What is the atomic number of francium?

Atomic number (Z): 87
‣ What is the symbol of francium?

Symbol: Fr
Atomic weight of francium: [223]
‣ Which block does francium belong to?

Block: s-block
‣ What group does francium belong to?

Group: 1 (hydrogen and alkali metals)
‣ What period is francium on the periodic table?

Period: 7
Francium covalent radius: 260 pm (extrapolated)
Francium Van der Waals radius: 348 pm (extrapolated)
‣ What is francium’s melting point?

Melting point: 300 K (27 °C, 81 °F)
‣ What is the boiling point of francium?

Boiling point: 950 K (677 °C, 1251 °F)
‣ How many electron shells does francium have?

Electrons per shell: 2, 8, 18, 32, 18, 8, 1
‣ What is the electron configuration of francium?

Electron configuration: [Rn] 7s1
‣ What is francium ionization energy?

Ionization energies:
1st: 393 kJ/mol
‣ What is the phase of francium?

Phase (at r.t): solid
‣ What is the density of francium?

Density (near r.t): 2.48 g/cm3 (estimated)
Francium magnetic ordering: paramagnetic
Francium natural occurrence: from decay
Common oxidation state of francium: +1
‣ What is the electronegativity of francium?

Electronegativity: Pauling scale: >0.79
‣ What is the crystal structure of francium?

Crystal structure: body-centered cubic (bcc)
Francium thermal conductivity: 15 W/(m.K) (extrapolated)
Francium electrical resistivity: 3 nΩ.m (calculated)
Francium CAS number: 7440-73-5

‣ Francium vapor pressure

Vapor pressure (extrapolated)
P (Pa)1101001 k10 k100 k
at T (K)404454519608738946

‣ How many isotopes does francium have?

Main isotopes of francium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
212Frsyn20.0 minβ+
α
212Rn
208At
221Frtrace4.8 minα217At
222Frsyn14.2 minβ222Ra
223Frtrace22.00 minβ
α
223Ra
219At

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