Ruthenium (Ru), element 44 – Learn Acer periodic table

Ruthenium

Transition metal, atomic number 44.

Ruthenium 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.

Facts

Symbol Ru. Atomic mass 101.072 u. Group 8, period 5. Electron configuration [Kr] 4d7 5s1. Electrons per shell 2, 8, 18, 15, 1. State at room temperature: Solid. Melting point 2333.8 °C, boiling point 4149.9 °C. Discovered by Karl Ernst Claus.

Element data from Wikipedia, CC BY-SA 3.0.