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.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.