CHEMISTRY

Ruthenium is a hard, white metal. It does not tarnish at room temperatures, but oxidises in air at about 800°C. The metal is not attacked by hot or cold acids or aqua regia, but when potassium chlorate is added to the solution, it oxidises explosively. ·  [|Symbol] : Ru ·   [|Atomic number] : 44 ·  [|Atomic weight]  : 101.07 (2) [see note  [|g]  ] ·  [|Standard state] : solid at 298 K ·   [|CAS Registry ID] : 7440-18-8 || ·   [|Group in periodic table] : 8 <span style="font-size: 10pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: ES-PE; mso-bidi-font-size: 11.0pt; msofareastfontfamily: Symbol; msobidifontfamily: Symbol; msofareastlanguage: ES-PE; msobidifontsize: 11.0pt; msolist: Ignore;">· <span style="font-family: 'Verdana','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: ES-PE;"> [|Group name] : Precious metal or Platinum group metal <span style="font-size: 10pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: ES-PE; mso-bidi-font-size: 11.0pt; msofareastfontfamily: Symbol; msobidifontfamily: Symbol; msofareastlanguage: ES-PE; msobidifontsize: 11.0pt; msolist: Ignore;">· <span style="font-family: 'Verdana','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: ES-PE;"> [|Period in periodic table] : 5 <span style="font-size: 10pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: ES-PE; mso-bidi-font-size: 11.0pt; msofareastfontfamily: Symbol; msobidifontfamily: Symbol; msofareastlanguage: ES-PE; msobidifontsize: 11.0pt; msolist: Ignore;">· <span style="font-family: 'Verdana','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: ES-PE;"> [|Block in periodic table] : d-block <span style="font-size: 10pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: ES-PE; mso-bidi-font-size: 11.0pt; msofareastfontfamily: Symbol; msobidifontfamily: Symbol; msofareastlanguage: ES-PE; msobidifontsize: 11.0pt; msolist: Ignore;">· <span style="font-family: 'Verdana','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: ES-PE;"> [|Colour] : silvery white metallic <span style="font-size: 10pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: ES-PE; mso-bidi-font-size: 11.0pt; msofareastfontfamily: Symbol; msobidifontfamily: Symbol; msofareastlanguage: ES-PE; msobidifontsize: 11.0pt; msolist: Ignore;">· <span style="font-family: 'Verdana','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: ES-PE;"> [|Classification] : Metallic ||
 * <span style="font-size: 10pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: ES-PE; mso-bidi-font-size: 11.0pt; msofareastfontfamily: Symbol; msobidifontfamily: Symbol; msofareastlanguage: ES-PE; msobidifontsize: 11.0pt; msolist: Ignore;">· <span style="font-family: 'Verdana','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: ES-PE;"> [|Name] : Ruthenium