Ruthenium Element (Periodic Table)

Ruthenium

Ruthenium (Ru) is a chemical element of the periodic table, located in the group 8 and the period 5, and has the atomic number 44. It is a hard, brittle, rare, lustrous, silvery-white transition metal, which is named after Ruthenia, the Latin name for Russia.

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 Ruthenium Element

Ruthenium
‣ What does ruthenium look like?

Appearance: silvery white metallic
‣ Who discovered ruthenium? When was the element ruthenium discovered?

Discovery and first isolation: Karl Ernst Claus (1844)
‣ Where is ruthenium on the periodic table?

Ruthenium Periodic Table

Location: Ruthenium is found in the eighth column of the periodic table, next to the technetium element.
Ruthenium atomic number (Z): 44
‣ What is the symbol of ruthenium?

Symbol: Ru
‣ What is the atomic weight for ruthenium?

Standard atomic weight: 101.07
‣ What block does ruthenium belong to?

Block: d-block
‣ What is the group number of the element ruthenium?

Group: 8
‣ What period is ruthenium on the periodic table?

Period: 5
Ruthenium atomic radius: empirical: 134 pm
Ruthenium covalent radius: 146±7 pm
‣ What is the melting point of ruthenium?

Melting point: 2607 K (2334 °C, 4233 °F)
‣ What is the boiling point of ruthenium?

Boiling point: 4423 K (4150 °C, 7502 °F)
‣ How many electron shells does ruthenium have?

Electrons per shell: 2, 8, 18, 15, 1
‣ What is the ruthenium electron configuration?

Electron configuration: [Kr] 4d7 5s1
Ruthenium ionization energies:
1st: 710.2 kJ/mol
2nd: 1620 kJ/mol
3rd: 2747 kJ/mol
‣ What is the phase of ruthenium?

Phase (at r.t): solid
Ruthenium density (near r.t): 12.45 g/cm3
when liquid (at m.p): 10.65 g/cm3
Ruthenium magnetic ordering: paramagnetic
Ruthenium natural occurrence: primordial
Ruthenium oxidation state: +2, +3, +4, +5, +6, +7, +8
‣ What’s the electronegativity of ruthenium?

Electronegativity: Pauling scale: 2.2
Ruthenium poisson’s ratio: 0.30
Ruthenium heat of fusion: 38.59 kJ/mol
Ruthenium heat of vaporization: 619 kJ/mol
Ruthenium molar heat capacity: 24.06 J/(mol K)
Ruthenium molar magnetic susceptibility: +39 × 10-6 cm3/mol (298 K)
Speed of sound in ruthenium: 5970 m/s (at 20 °C)
‣ What is the crystal structure of ruthenium?

Crystal structure: hexagonal close-packed (hcp)
Thermal expansion of ruthenium: 6.4 µm/(m.K) (at 25 °C)
Thermal conductivity of ruthenium: 117 W/(m.K)
Ruthenium electrical resistivity: 71 nΩ.m (at 20 °C)
‣ Ruthenium hardness

Mohs hardness: 6.5
Brinell hardness: 2160 MPa
Young’s modulus of ruthenium: 447 GPa
Shear modulus of ruthenium: 173 GPa
Bulk modulus of ruthenium: 220 GPa
Ruthenium CAS number: 7440-18-8

‣ Ruthenium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)258828113087342438454388

‣ What are the main isotopes of ruthenium?

Main isotopes of ruthenium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
96Ru5.54 %stable
97Rusyn2.9 dε
γ
97Tc
98Ru1.87 %stable
99Ru12.76 %stable
100Ru12.60 %stable
101Ru17.06 %stable
102Ru31.55 %stable
103Rusyn39.26 dβ
γ
103Rh
104Ru18.62 %stable
106Rusyn373.59 dβ106Rh

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