Rhodium Element (Periodic Table)

Rhodium

Rhodium (Rh) is a chemical element of the periodic table, located in the group 9 and the period 5, and is having the atomic number 45. It is a rare, lustrous, silvery-white transition metal, whose name comes from the Greek word “rhodon”, which means rose colored.

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 Rhodium Element

Rhodium
‣ What does rhodium look like?

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

Discovery and first isolation: William Hyde Wollaston (1804)
‣ What column is rhodium in on the periodic table?

Rhodium Periodic Table

Location: Rhodium is found in the ninth column of the periodic table, next to the ruthenium element.
‣ What is the atomic number of rhodium?

Atomic number (Z): 45
‣ What is rhodium symbol?

Symbol: Rh
Rhodium atomic weight: 102.90549
‣ What block does rhodium belong to?

Block: d-block
‣ What group is rhodium in the periodic table?

Group: 9
‣ What period is rhodium in the periodic table?

Period: 5
‣ What is the atomic radius of rhodium?

Atomic radius: empirical: 134 pm
Rhodium covalent radius: 142±7 pm
‣ What is rhodium melting point?

Melting point: 2237 K (1964 °C, 3567 °F)
‣ What is the boiling point of rhodium?

Boiling point: 3968 K (3695 °C, 6683 °F)
‣ How many electrons does rhodium have?

Electrons per shell: 2, 8, 18, 16, 1
‣ What is the electron configuration for rhodium?

Electron configuration: [Kr] 4d8 5s1
‣ What is the ionization energy of rhodium?

Ionization energies:
1st: 719.7 kJ/mol
2nd: 1740 kJ/mol
3rd: 2997 kJ/mol
‣ What is the phase of rhodium?

Phase (at r.t): solid
‣ What is the rhodium density?

Density (near r.t): 12.41 g/cm3
when liquid (at m.p): 10.7 g/cm3
Rhodium magnetic ordering: paramagnetic
Rhodium natural occurrence: primordial
Rhodium oxidation state: +1, +2, +3, +4, +5, +6
Rhodium electronegativity: Pauling scale: 2.28
Rhodium poisson’s ratio: 0.26
Rhodium heat of fusion: 26.59 kJ/mol
Rhodium heat of vaporization: 493 kJ/mol
Rhodium molar heat capacity: 24.98 J/(mol K)
Rhodium molar magnetic susceptibility: +111.0 × 10-6 cm3/mol (298 K)
Speed of sound in rhodium: 4700 m/s (at 20 °C)
Rhodium crystal structure: face-centered cubic (fcc)
Thermal expansion of rhodium: 8.2 µm/(m.K) (at 25 °C)
Thermal conductivity of rhodium: 150 W/(m.K)
Rhodium electrical resistivity: 43.3 nΩ.m (at 0 °C)
‣ Rhodium hardness

Mohs hardness: 6.0
Vickers hardness: 1100-8000 MPa
Brinell hardness: 980-1350 MPa
Young’s modulus of rhodium: 380 GPa
Shear modulus of rhodium: 150 GPa
Bulk modulus of rhodium: 275 GPa
Rhodium CAS number: 7440-16-6

‣ Rhodium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)228824962749306334053997

‣ How many isotopes does rhodium have?

Main isotopes of rhodium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
99Rhsyn16.1 dε
γ
99Ru
101Rhsyn4.34 dε
IT
γ
101Ru
101Rh
101Rhsyn3.3 yε
γ
101Ru
102Rhsyn3.7 yε
γ
102Ru
102Rhsyn207 dε
β+
β
γ
102Ru
102Ru
102Pd
103Rh100 %stable
105Rhsyn35.36 hβ
γ
105Pd

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