What is Ru? Important knowledge about Ru.

1. Definition of Ru
   Ru is an abbreviation of Ruthenium, a chemical element with the symbol Ru and atomic number 44. It belongs to group 8, period 5 of the periodic table. Ru is a transition metal, silver-white in color with cubic crystal structures.

1.1 Names
1.1.1 Common name: Ruthenium
1.1.2 English name: Ruthenium
1.2. Atomic number: 44
1.3. Atomic mass: 101.07(2) u
1.3.1 Molecular structure: Ruthenium exists as single atoms in its natural state.
1.4 Ion structure: It often participates in reactions to form Ru₃+ and Ru₄+ ions.

2. Properties of Ru
   2.1 Physical properties of Ru
   State: Solid at room temperature
   Color: Silver-white
   Odor: Odorless
   pH: Not applicable
   2.2 Chemical properties of Ru: Ruthenium is very durable and corrosion-resistant. It resists strong acids and only dissolves in hot lime acid.

3. Common chemical reactions of Ru
   Ruthenium does not frequently participate in chemical reactions under normal conditions.

4. Preparation of Ru
   4.1 Laboratory preparation of Ru: Ruthenium is usually prepared from sources of platinum. It can also be found in various types of nickel and cobalt ores.
   4.2 Industrial preparation of Ru: In industry, ruthenium is extracted from platinum-containing ores by treating with hydrochloric acid, then heating with sodium to create ruthenium salts.