individual rhodium atoms imaged by P. D. Nellist and S. J. Pennycook using a 300 kilovolt scanning transmission electron microscope

Rh - Rhodium

This transition element was discovered in 1803 by Wollaston in London.

Atomic number - 45 Density g/mL 12 .4

Atomic weight u 102 .9055 Melting point K 2236

Bonding radius A 1 .25 Boiling point K 3970

Atomic radius A 1 .83 Heat of vaporization kJ/mol 493

Ionization Potential V 7 .46 Heat of fusion kJ/mol 21 .5

Electronegativity - 2 .28 Specific heat J/gK 0 .242

The oxide is amphoteric.
Crystal are face centered cubic.

Electron config. : [Kr] 4d⁸ 5s¹

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Rh: Click mass number for decay process, product for element page.

093

EC,8.100 MeV
Ru-93
92.925710 094
25.8 sec
EC,9.600 MeV
Ru-94
93.921738 095
5.02 min
EC,5.110 MeV
Ru-95
94.915898 096
9.90 min
EC,6.446 MeV
Ru-96
95.914524 097
30.7 min
EC,3.520 MeV
Ru-97
96.911346 098
8.7 min
EC,5.057 MeV
Ru-98
97.910716 099
16.1 da
EC,2.103 MeV
Ru-99
98.908195

100
20.8 hr
EC,3.630 MeV
Ru-100
99.908115 101
3.3 yr
EC,1.614 MeV
Ru-101
100.90616 101a
4.34 da
EC,1.614 MeV
Ru-101
100.90633 102
207 da
B-/EC,2.323
Pd-102/Ru-102
101.90684 102a
2.9 yr
EC,2.464 MeV
Ru-102
101.90699 103 100%

Stable

102.90550 104
42.3 sec
B-/EC,2.441
Pd-104/Ru-104
103.90665

105
35.36 hr
B-,1.917 MeV
Pd-105
104.90569 106
29.80 sec
B-,3.541 MeV
Pd-106
105.90728 107
21.7 min
B-,1.511 MeV
Pd-107
106.90675 108
16.8 sec
B-,4.510 MeV
Pd-108
107.90872 109
80 sec
B-,2.591 MeV
Pd-109
108.90873 110
3.2 sec
B-,5.400 MeV
Pd-110
109.91094 111
11 sec
B-,3.740 MeV
Pd-111
110.91165

112
2.1 sec
B-,6.800 MeV
Pd-112
111.91465 113
2.80 sec
B-,4.900 MeV
Pd-113
112.91540 114
1.85 sec
B-,7.900 MeV
Pd-114
113.91884 115
0.99 sec
B-,6.000 MeV
Pd-115
114.92012 116
0.68 sec
B-,8.900 MeV
Pd-116
115.92367 117
0.44 sec
B-,7.000 MeV
Pd-117
116.92538

MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

Atomic number	-	45		Density	g/mL	12	.4
Atomic weight	u	102	.9055	Melting point	K	2236
Bonding radius	A	1	.25	Boiling point	K	3970
Atomic radius	A	1	.83	Heat of vaporization	kJ/mol	493
Ionization Potential	V	7	.46	Heat of fusion	kJ/mol	21	.5
Electronegativity	-	2	.28	Specific heat	J/gK	0	.242
The oxide is amphoteric.				Crystal are face centered cubic.
Electron config. : [Kr] 4d⁸ 5s¹
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093 EC,8.100 MeV Ru-93 92.925710	094 25.8 sec EC,9.600 MeV Ru-94 93.921738	095 5.02 min EC,5.110 MeV Ru-95 94.915898	096 9.90 min EC,6.446 MeV Ru-96 95.914524	097 30.7 min EC,3.520 MeV Ru-97 96.911346	098 8.7 min EC,5.057 MeV Ru-98 97.910716	099 16.1 da EC,2.103 MeV Ru-99 98.908195
100 20.8 hr EC,3.630 MeV Ru-100 99.908115	101 3.3 yr EC,1.614 MeV Ru-101 100.90616	101a 4.34 da EC,1.614 MeV Ru-101 100.90633	102 207 da B-/EC,2.323 Pd-102/Ru-102 101.90684	102a 2.9 yr EC,2.464 MeV Ru-102 101.90699	103 100% Stable 102.90550	104 42.3 sec B-/EC,2.441 Pd-104/Ru-104 103.90665
105 35.36 hr B-,1.917 MeV Pd-105 104.90569	106 29.80 sec B-,3.541 MeV Pd-106 105.90728	107 21.7 min B-,1.511 MeV Pd-107 106.90675	108 16.8 sec B-,4.510 MeV Pd-108 107.90872	109 80 sec B-,2.591 MeV Pd-109 108.90873	110 3.2 sec B-,5.400 MeV Pd-110 109.91094	111 11 sec B-,3.740 MeV Pd-111 110.91165
112 2.1 sec B-,6.800 MeV Pd-112 111.91465	113 2.80 sec B-,4.900 MeV Pd-113 112.91540	114 1.85 sec B-,7.900 MeV Pd-114 113.91884	115 0.99 sec B-,6.000 MeV Pd-115 114.92012	116 0.68 sec B-,8.900 MeV Pd-116 115.92367	117 0.44 sec B-,7.000 MeV Pd-117 116.92538
MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass