Q.

Which element behaves chemically both as metal and nonmetal?

A. Argon
B. Boron
C. Xenon
D. Carbon
Answer» B. Boron
Explanation: Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony.Elements which are neither metals nor non- metals are called Noble Gases.
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