We Use Cookies
We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. For more information, please review our cookie policy and privacy policy.
By choosing I Accept, you consent to our use of cookies and other tracking technologies.

Ruthenium (Ru)

From Wikipedia, the free encyclopediaRuthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals.

Ruthenium in the periodic table

Atomic number44
Element categoryTransition Metal

Physical properties

Phase at STPSolid
Density12.45 g/cm3
Atomic weight101.072 u
Melting point2607 K
2333.85 °C
4232.93 °F
Boiling point4423 K
4149.85 °C
7501.73 °F

Atomic properties

Electronegativity (Pauling Scale)2.2
Electron affinity100.96 kJ/mol
Oxidation states−4, −2, 0, +1, +2, +3, +4, +5, +6, +7, +8
(a mildly acidic oxide)
Ionization energies
1710.2 kJ/mol
2 1620 kJ/mol
3 2747 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Kr] 4d7 5s1
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d7 5s1
Electrons per shell2, 8, 18, 15, 1


Discovered byKarl Ernst Claus
Warning: Undefined variable $footer in /customers/a/d/1/periodictable.one/httpd.www/inc/footer.php on line 34