Technetium is an element and therefore does not contain any compounds! If the questioner meant to ask, "What are 3 compounds of technetium", that is a different question. The following compounds are listed on a web site with no obvious copyright notices:
Technetium react with oxygen, halogens, oxygen, sulfur, selenium, tellurium, boron, carbon etc. and can form alloys with metals.
Technetium is odorless.
Technetium was not tasted !
The Brinell hardness of technetium is 112.The Vickers hardness of technetium is 151.
Technetium is a solid metal.
Technetium is not abundant. Compounds of Tc are most used.
technetium forms with other elements to make compounds
Examples of technetium compounds are: TcO2, Tc2O7, HTcO4, TcS2, Tc2S7, Tc2(CO)10, Tc6C, TcF6, TcF5, TcCl6, TcCl4, TcBr4 etc.
Technetium can form oxides, chlorides, bromides, fluorides, sulfides, selenides, tellurides, carbides, pertechnetates etc.
Technetium can form oxides, chlorides, bromides, fluorides, sulfides, selenides, tellurides, carbides, pertechnetates etc.
Technetium react with oxygen, halogens, oxygen, sulfur, selenium, tellurium, boron, carbon etc. and can form alloys with metals.
Technetium can have oxidation states ranging from -3 to +7. However, the most common and stable oxidation state for technetium is +7.
Technetium valences are between -1 and +7; the most usual valences are +3, +4 and +7.
Technetium exist in nature only in ultratraces; being unstable technetium technetium was lost by radioactive decay.
Technetium is odorless.
Technetium is not from Japan.
Technetium is a metal.