Question

Which of the following is not a Metalloid?

(a) Germanium

(b) Silicon

(c) Aluminum

(d) Tellurium

I got this question during an internship interview.

Origin of the question is Electronic Configurations and Types of Elements: s, p, d and f Blocks topic in section Classification of Elements and Periodicity in Properties of Chemistry – Class 11

Answer 1

The correct option is (c) Aluminum

For explanation: Metalloids are those with both the properties of metals and non-metals. They are also known as Semi-metals. They are 8 metalloids known till date, namely boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At).