Germanium diodes are more expensive than silicon ones, germanium is harder to process, germanium cannot be used to make integrated circuits (while early prototype integrated circuits were germanium the wiring between the integrated components cannot be integrated making it too expensive for production), germanium cannot operate with a junction temperature above 60C (silicon will operate up to 150C), and its reverse leakage current is greater. However! Germanium diodes have a lower forward voltage drop than silicon ones do, so they're better for some applications, like radio frequency detection.
Germanium compounds are toxic.
Germanium does no "do" anything.
Germanium is not manufactured; its ore is mined then refined into germanium.
Germanium is a semiconductor
germanium reacts naturally
Germanium is Ge.
No, germanium is very brittle.
Yes, germanium is an element.
Germanium is a metalloid.
Germanium is a semiconductor.
Natural germanium has only one radioactive isotope - germanium 76. 27 artificial radioisotopes of germanium are known.