Beryllium Element (Periodic Table)

Beryllium

Beryllium (Br) is a chemical element of the periodic table, located in the group 2 and the period 2, and is having the atomic number 4. It is a lightweight, strong, and brittle silvery-white alkaline earth metal, whose name comes from the Greek word “beryllos”, which means mineral beryl. It is the lightest alkaline earth metal.

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 Beryllium Element

Beryllium
‣ What does beryllium look like?

Appearance: white-gray metallic
‣ When was beryllium discovered and by whom?

Discovery: Louis Nicolas Vauquelin (1798)
First isolation: Friedrich Wohler & Antoine Bussy (1828)
‣ Where is beryllium found on the periodic table?

Beryllium Periodic Table

Location: Beryllium is found in the second column of the periodic table, next to the lithium element.
‣ What is beryllium’s atomic number?

Atomic number (Z): 4
‣ What is beryllium’s symbol?

Symbol: Be
‣ What is the atomic weight of beryllium?

Standard atomic weight: 9.0121831
‣ Which block does beryllium belong to?

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

Group: 2 (alkaline earth metals)
‣ What period is beryllium in on the periodic table?

Period: 2
‣ What is the atomic radius of beryllium?

Atomic radius: empirical: 112 pm
Beryllium covalent radius: 96±3 pm
Beryllium Van der Waals radius: 153 pm
‣ What is beryllium’s melting point?

Melting point: 1560 K (1287 °C, 2349 °F)
‣ What is the boiling point of beryllium?

Boiling point: 2742 K (2469 °C, 4476 °F)
Beryllium critical point: 5205 K, Mpa (extrapolated)
‣ How many electron shells does beryllium have?

Electrons per shell: 2, 2
‣ What is beryllium’s electron configuration?

Electron configuration: [He] 2s2
‣ What is beryllium ionization energy?

Ionization energies:
1st: 899.5 kJ/mol
2nd: 1757.1 kJ/mol
3rd: 14,848.7 kJ/mol
‣ What phase is beryllium in at room temperature?

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

Density (near r.t): 1.85 g/cm3
when liquid (at m.p): 1.690 g/cm3
Beryllium magnetic ordering: diamagnetic
Beryllium natural occurrence: primordial
Oxidation state of beryllium: +2
‣ What is beryllium’s electronegativity?

Electronegativity: Pauling scale: 1.57
Beryllium poisson’s ratio: 0.032
Beryllium heat of fusion: 12.2 kJ/mol
Beryllium heat of vaporization: 292 kJ/mol
Beryllium molar heat capacity: 16.443 J/(mol K)
Beryllium molar magnetic susceptibility: -9.0 × 10-6 cm3/mol
Speed of sound in beryllium: 12,890 m/s (at r.t)
‣ What is the structure of beryllium?

Crystal structure: hexagonal close-packed (hcp)
Thermal expansion of beryllium: 11.3 µm/(m.K) (at 25 °C)
Thermal conductivity of beryllium: 200 W/(m.K)
Beryllium electrical resistivity: 36 nΩ.m (at 20 °C)
‣ What is the hardness of beryllium?

Mohs hardness: 5.5
Vickers hardness: 1670 MPa
Brinell hardness: 590-1320 MPa
Young’s modulus of beryllium: 287 GPa
Shear modulus of beryllium: 132 GPa
Bulk modulus of beryllium: 130 GPa
Beryllium CAS number: 7440-41-7

‣ Beryllium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)146216081791202323272742

‣ How many isotopes does beryllium have?

Main isotopes of beryllium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
7Betrace53.12 dε
γ
7Li
9Be100 %stable
10Betrace1.39 × 106 yβ10B

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