Magnesium Element (Periodic Table)

Magnesium

Magnesium (Mg) is a chemical element of the periodic table, located in the group 2 and the period 3, and is having the atomic number 12. It is a shiny, silver or grey colored alkaline earth metal, whose name comes from Magnesia, a district of Eastern Thessaly in Greece, where the mineral magnesia alba was first found. It is the lightest structural metal and the seventh 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
– s block

FAQs on Magnesium Element

Magnesium
‣ What does magnesium look like?

Appearance: shiny grey solid
‣ When was magnesium discovered and by whom?

Discovery: Joseph Black (1755)
First isolation: Humphry Davy (1808)
‣ Where is magnesium found on the periodic table?

Magnesium Periodic Table

Location: Magnesium is found in the second column of the periodic table, next to the sodium element.
‣ What is magnesium’s atomic number?

Atomic number (Z): 12
‣ What is magnesium symbol?

Symbol: Mg
‣ What is the atomic weight of magnesium?

Standard atomic weight: [24.304, 24.307] conventional: 24.305
‣ What block is magnesium in the periodic table?

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

Group: 2 (alkaline earth metals)
‣ What period does magnesium belong to?

Period: 3
‣ What is the atomic radius of magnesium?

Atomic radius: empirical: 160 pm
Magnesium covalent radius: 141±7 pm
Magnesium Van der Waals radius: 173 pm
‣ What is magnesium’s melting point?

Melting point: 923 K (650 °C, 1202 °F)
‣ What is magnesium’s boiling point?

Boiling point: 1363 K (1091 °C, 1994 °F)
‣ How many electron shells does magnesium have?

Electrons per shell: 2, 8, 2
‣ What is magnesium electron configuration?

Electron configuration: [Ne] 3s2
‣ What is magnesium ionization energy?

Ionization energies:
1st: 737.7 kJ/mol
2nd: 1450.7 kJ/mol
3rd: 7732.7 kJ/mol
‣ What’s the phase of magnesium?

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

Density (near r.t): 1.738 g/cm3
when liquid (at m.p): 1.584 g/cm3
Magnesium magnetic ordering: paramagnetic
Magnesium natural occurrence: primordial
‣ What is the oxidation state of magnesium?

Oxidation state: +2
‣ What is the electronegativity of magnesium?

Electronegativity: Pauling scale: 1.31
Magnesium poisson’s ratio: 0.290
Magnesium heat of fusion: 8.48 kJ/mol
Magnesium heat of vaporization: 128 kJ/mol
Magnesium molar heat capacity: 24.869 J/(mol K)
Magnesium molar magnetic susceptibility: +13.1 × 10-6 cm3/mol (298 K)
Speed of sound in magnesium: 4940 m/s (at r.t) (annealed)
‣ What is the crystal structure of magnesium?

Crystal structure: hexagonal close-packed (hcp)
Thermal expansion of magnesium: 24.8 µm/(m.K) (at 25 °C)
Thermal conductivity of magnesium: 156 W/(m.K)
Magnesium electrical resistivity: 43.9 nΩ.m (at 20 °C)
‣ What is the hardness of magnesium?

Mohs hardness: 1-2.5
Brinell hardness: 44-260 MPa
Young’s modulus of magnesium: 45 GPa
Shear modulus of magnesium: 17 GPa
Bulk modulus of magnesium: 35.4 GPa
Magnesium CAS number: 7439-95-4

‣ Magnesium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)70177386197111321361

‣ How many isotopes does magnesium have?

Main isotopes of magnesium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
24Mg79.0 %stable
25Mg10.0 %stable
26Mg11.0 %stable

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