Indium Element (Periodic Table)

Indium

Indium (In) is a chemical element of the periodic table, located in the group 13 and the period 5, and is having the atomic number 49. It is a soft, lustrous, silvery-white post transition metal, whose name comes from the Latin word “indicium”, which means violet or indigo. It is a member of the boron group.

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
– p block

FAQs on Indium Element

Indium
‣ What does indium look like?

Appearance: silvery lustrous grey
‣ Who discovered indium? When was the element indium discovered?

Discovery: Ferdinand Reich and Hieronymous Theodor Richter (1863)
First isolation: Hieronymous Theodor Richter (1864)
‣ Where is indium on the periodic table?

Indium Periodic Table

Location: Indium is found in the fifth row of the periodic table below the gallium element.
‣ What is the atomic number of indium?

Atomic number (Z): 49
‣ What is the symbol of indium?

Symbol: In
Indium atomic weight: 114.818
‣ What block is indium in the periodic table?

Block: p-block
‣ What group is indium on the periodic table?

Group: 13 (boron group)
‣ What period is indium in the periodic table?

Period: 5
‣ What is the atomic radius of indium?

Atomic radius: empirical: 167 pm
Indium covalent radius: 142±5 pm
Indium Van der Waals radius: 193 pm
‣ What is the melting point of indium?

Melting point: 429.7485 K (156.5985 °C, 313.8773 °F)
‣ What is the boiling point of indium?

Boiling point: 2345 K (2072 °C, 3762 °F)
Indium triple point: 429.7445 K, ~1 kPa
‣ How many electron shells does indium have?

Electrons per shell: 2, 8, 18, 18, 3
‣ What is the condensed electron configuration of indium?

Electron configuration: [Kr] 4d10 5s2 5p1
Indium ionization energies:
1st: 558.3 kJ/mol
2nd: 1820.7 kJ/mol
3rd: 2704 kJ/mol
‣ What is the phase of indium?

Phase (at r.t): solid
Indium density (near r.t): 7.31 g/cm3
when liquid (at m.p): 7.02 g/cm3
Indium magnetic ordering: diamagnetic
Indium natural occurrence: primordial
Indium oxidation state: +1, +3
‣ What’s the electronegativity of indium?

Electronegativity: Pauling scale: 1.78
Indium heat of fusion: 3.281 kJ/mol
Indium heat of vaporization: 231.8 kJ/mol
Indium molar heat capacity: 26.74 J/(mol K)
Indium molar magnetic susceptibility: -64.0 × 10-6 cm3/mol (298 K)
Speed of sound in indium: 1215 m/s (at 20 °C)
‣ What is the crystal structure of indium?

Crystal structure: body-centered tetragonal
Thermal expansion of indium: 32.1 µm/(m.K) (at 25 °C)
Thermal conductivity of indium: 81.8 W/(m.K)
Indium electrical resistivity: 83.7 nΩ.m (at 20 °C)
‣ Indium hardness

Mohs hardness: 1.2
Brinell hardness: 8.8-10.0 MPa
Young’s modulus of indium: 11 GPa
Indium CAS number: 7440-74-6

‣ Indium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)119613251485169019622340

‣ How many isotopes does indium have?

Main isotopes of indium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
111Insyn2.8 dε111Cd
113In4.28 %stable
115In95.72 %4.41 × 1014 yβ115Sn

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