Question

what do you mean by borderline elements

Answer 1

Metalloids. The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elementsfound along the step like line between metals and non-metals of the periodic table. Metalloids have properties of both metals and non-metals....
These are known as borderline elements..

Hope it helps u..!

Answer 2

Metalloids are called borderline elements. ..
as they separates the metals from non-metals..
Boron(B)
Silicon(Si)
Germanium (Ge)
Arsenic (As)
Antimony (Sb)
Tellurium (Te)
Polinium(Po)
Astatine(At)