Mendeleev's Periodic Table > Ru - Ruthenium

Ru - Ruthenium

Ruthenium was discovered in 1827 by Osann in Russia. Ruthenium is a hard, white metal. It does not tarnish at room temperatures, but oxidises in air at about 800°C. The Ruthenium metal is not attacked by hot or cold acids or aqua regia, but when potassium chlorate is added to the solution, it oxidises explosively.

Ruthenium, rhodium, palladium, osmium, iridium, and platinum together make up a group of elements referred to as the platinum group metals (PGM).

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

Isotopes of Ru (Ruthenium):

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	098 1.88% Stable 97.905286	099 12.7% Stable 98.905938	100 12.6% Stable 99.904218	101 17.0% Stable 100.90558
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	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

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