Rhodium Element (Periodic Table)

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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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