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Barium

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Barium
Barium
Identification
Symbol
Ba
Block
s - Block
Group
2
Period
6
Atomic Information
Atomic Number
56
Atomic Radius
0.135 (ionic) pm
Mass
137.327 g/mol
Category
Standard state(298 K)
Solid
Electronic Configuration
[Xe] 6s2
Electronegativity (Pauling)
0.89
Could not retrieve
First ionisation energy
502.9 kJ mol‑1
Physical Properties
Color
Silvery white
Melting Point
1000 K
Boiling Point
2143 K
Density of solid
3510 kg m-3
Could not retrieve
Heat Properties
Enthalpy of fusion
8.0 kJ mol-1
Enthalpy of atomisation
182 kJ mol-1
Enthalpy of vaporisation
140 kJ mol-1
4
Be

Beryllium
12
Mg

Magnesium
20
Ca

Calcium
38
Sr

Strontium
56
Ba

Barium
88
Ra

Radium

Barium is a soft, very reactive metallic element and is the fifth element in Group 2 of the periodic table i.e. alkaline earth elements. Barium, when pure, is silvery white like lead. The metal oxidises very easily and it reacts with water or alcohol. Barium salts impart Apple-green colour to flames. Metallic barium is very reactive with air and water, and serves in vacuum tubes and pipes to remove unwanted gases, suppressing high pressures and preventing blowouts. The element is used in metallurgy, and its compounds are used in pyrotechnics, petroleum production, and radiology. Barium is eighteenth in abundance in the Earth's crust, where it is found to the extent of 0.04%, making it intermediate in amount between calcium and strontium, the other alkaline-earth metals.

1
H
2
He
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
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
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
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
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


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