Germanium is an element that reacts naturally to other substances.
Germanium is not a very reactive element - the electronegativity is 2,01.
germanium reacts naturally
Yes, they are reactive to nature.
slicon of course
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 is Ge.
No, germanium is very brittle.
Germanium is a metalloid.
Yes, germanium is an element.