Iron Element (Periodic Table)

Iron

Iron (Fe) is a chemical element of the periodic table, located in the group 8 and the period 4, and is having the atomic number 26. It is a ductile, lustrous, silvery-grey transition metal, whose name comes from the Anglo-Saxon word “iren”. It is the cheapest metal and is the fourth most abundant element on earth.

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
– d block

FAQs on Iron Element

Iron
‣ What does iron look like?

Appearance: lustrous metallic with a greyish tinage
‣ When was iron discovered and by whom?

Discovery: before 5000 BC
‣ Where is iron located on the periodic table?

Iron Periodic Table

Location: Iron is found in the eighth column of the periodic table, next to the manganese element.
‣ What is iron’s atomic number?

Atomic number (Z): 26
‣ What is the chemical symbol for iron?

Symbol: Fe
‣ What is the atomic weight of iron?

Standard atomic weight: 55.845
‣ What block is iron in on the periodic table?

Block: d-block
‣ What group does iron belong to on the periodic table?

Group: 8
‣ What is iron’s period number?

Period: 4
‣ What is the atomic radius of iron?

Atomic radius: empirical: 126 pm
Iron covalent radius:
Low spin: 132±3 pm
High spin: 152±6 pm
Iron Van der Waals radius: 194 pm
‣ What is iron’s melting point?

Melting point: 1811 K (1538 °C, 2800 °F)
‣ What is iron’s boiling point?

Boiling point: 3134 K (2862 °C, 5182 °F)
‣ What is the curie point of iron?

Curie point: 1043 K
‣ How many electron shells does iron have?

Electrons per shell: 2, 8, 14, 2
‣ What is the ground state electron configuration of iron?

Electron configuration: [Ar] 3d6 4s2
‣ What is the ionization energy of iron?

Ionization energies:
1st: 762.5 kJ/mol
2nd: 1561.9 kJ/mol
3rd: 2957 kJ/mol
‣ What is iron’s phase at room temperature?

Phase (at r.t): solid
‣ What is iron’s density?

Density (near r.t): 7.874 g/cm3
when liquid (at m.p): 6.98 g/cm3
Iron magnetic ordering: ferromagnetic
Iron natural occurrence: primordial
‣ What is the oxidation state of iron?

Oxidation state: +2, +3, +4, +6
‣ What is iron’s electronegativity?

Electronegativity: Pauling scale: 1.83
Iron poisson’s ratio: 0.29
Iron heat of fusion: 13.81 kJ/mol
Iron heat of vaporization: 340 kJ/mol
Iron molar heat capacity: 25.10 J/(mol K)
Speed of sound in iron: 5120 m/s (at r.t) (electrolytic)
‣ What is the crystal structure of iron?

Crystal structure: body-centered cubic (bcc) a = 286.65 pm
Crystal structure: face-centered cubic (fcc) between 1185-1667 K; a = 364.680 pm
Thermal expansion of iron: 11.8 µm/(m.K) (at 25 °C)
Thermal conductivity of iron: 80.4 W/(m.K)
Iron electrical resistivity: 96.1 nΩ.m (at 20 °C)
‣ What is iron’s hardness?

Mohs hardness: 4
Vickers hardness: 608 MPa
Brinell hardness: 200-1180 MPa
Young’s modulus of iron: 211 GPa
Shear modulus of iron: 82 GPa
Bulk modulus of iron: 170 GPa
Iron CAS number: 7439-89-6

‣ Iron vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)172818902091234626793132

‣ How many isotopes does iron have?

Main isotopes of iron
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
54Fe5.85 %stable
55Fesyn2.73 yε55Mn
56Fe91.75 %stable
57Fe2.12 %stable
58Fe0.28 %stable
59Fesyn44.6 dβ59Co
60Fetrace2.6 × 106 yβ60Co

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