Ru - Ruthenium

Ruthenium was discovered in 1827 by Osann in Russia.

Atomic number - 44 Density g/mL 12 .2

Atomic weight u 101 .07 Melting point K 2523

Bonding radius A 1 .25 Boiling point K 4423

Atomic radius A 1 .89 Heat of vaporization kJ/mol 595

Ionization Potential V 7 .37 Heat of fusion kJ/mol 24

Electronegativity - 2 .2 Specific heat J/gK 0 .238

The oxide is mildly acidic.
Crystal are hexagonal.

Electron config. : [Kr] 4d⁷ 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 Ru: Click mass number for decay process, product for element page.

090
13 sec
EC,5.600 MeV
Tc-90
89.929790 091
9 sec
EC/ECp,7.400
Tc-91/Mo-90
90.926354 092
3.65 min
EC,4.500 MeV
Tc-92
91.920128 093
59.7 sec
EC/ECp,6.340
Tc-93/Mo-92
92.917047 094
51.8 min
EC,1.593 MeV
Tc-94
93.911365 095
1.643 hr
EC,2.572 MeV
Tc-95
94.910418 096 5.52%

Stable

95.907603

097
2.9 da
EC,1.115 MeV
Tc-97
96.907560 098 1.88%

Stable

97.905286 099 12.7%

Stable

98.905938 100 12.6%

Stable

99.904218 101 17.0%

Stable

100.90558 102 31.6%

Stable

101.90434 103
39.26 da
B-,2.660 MeV
Rh-103
102.90632

104 18.7%

Stable

103.90542 105
4.44 hr
B-,1.917 MeV
Rh-105
104.90774 106
373.59 da
B-,6.547 MeV
Rh-106
105.90732 107
3.75 min
B-,2.940 MeV
Rh-107
106.90990 108
4.55 min
B-,1.360 MeV
Rh-108
107.91018 109
34.5 sec
B-,4.160 MeV
Rh-109
108.91320 110
14.6 sec
B-,2.810 MeV
Rh-110
109.91396

111
2.12 sec
B-,5.500 MeV
Rh-111
110.91755 112
1.75 sec
B-,3.670 MeV
Rh-112
111.91851 113
0.80 sec
B-,6.600 MeV
Rh-113
112.92249 114
0.53 sec
B-,4.800 MeV
Rh-114
113.92399 115
0.40 sec
B-/B-n,7.600
Rh-115/Rh-114
114.92828 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	-	44		Density	g/mL	12	.2
Atomic weight	u	101	.07	Melting point	K	2523
Bonding radius	A	1	.25	Boiling point	K	4423
Atomic radius	A	1	.89	Heat of vaporization	kJ/mol	595
Ionization Potential	V	7	.37	Heat of fusion	kJ/mol	24
Electronegativity	-	2	.2	Specific heat	J/gK	0	.238
The oxide is mildly acidic.				Crystal are hexagonal.
Electron config. : [Kr] 4d⁷ 5s¹
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090 13 sec EC,5.600 MeV Tc-90 89.929790	091 9 sec EC/ECp,7.400 Tc-91/Mo-90 90.926354	092 3.65 min EC,4.500 MeV Tc-92 91.920128	093 59.7 sec EC/ECp,6.340 Tc-93/Mo-92 92.917047	094 51.8 min EC,1.593 MeV Tc-94 93.911365	095 1.643 hr EC,2.572 MeV Tc-95 94.910418	096 5.52% Stable 95.907603
097 2.9 da EC,1.115 MeV Tc-97 96.907560	098 1.88% Stable 97.905286	099 12.7% Stable 98.905938	100 12.6% Stable 99.904218	101 17.0% Stable 100.90558	102 31.6% Stable 101.90434	103 39.26 da B-,2.660 MeV Rh-103 102.90632
104 18.7% Stable 103.90542	105 4.44 hr B-,1.917 MeV Rh-105 104.90774	106 373.59 da B-,6.547 MeV Rh-106 105.90732	107 3.75 min B-,2.940 MeV Rh-107 106.90990	108 4.55 min B-,1.360 MeV Rh-108 107.91018	109 34.5 sec B-,4.160 MeV Rh-109 108.91320	110 14.6 sec B-,2.810 MeV Rh-110 109.91396
111 2.12 sec B-,5.500 MeV Rh-111 110.91755	112 1.75 sec B-,3.670 MeV Rh-112 111.91851	113 0.80 sec B-,6.600 MeV Rh-113 112.92249	114 0.53 sec B-,4.800 MeV Rh-114 113.92399	115 0.40 sec B-/B-n,7.600 Rh-115/Rh-114 114.92828	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass