Metalloids have properties intermediate between those of metals and nonmetals. an example of a metalloid is

Following are the examples of Metalloids;

                                     1)  Boron

                                     2)  Silicon

                                     3)  Germanium

                                     4)  Arsenic

                                     5)  Antimony

                                     6)  Tellurium

                                     7)  Polonium

First six are the common metalloids. While, Polonium is less frequently classified as metalloid. These elements have appearance same as that of metals but they are not as good conductors as metals are. They are often used as catalysts, as semiconductors (as they increase conduction on increase in temperature) and have vast medical importance.

The answer should be vaporization