those of nonmetals. Although most metals form ionic compounds, metalloids as a
group may form ionic or covalent bonds. Under certain conditions pure metalloids
conduct electricity, but do so poorly, and are thus termed semiconductors. This
property makes the metalloids important in microcircuitry.
The metalloids are located in the periodic table along the heavy dark line
that starts alongside boron and drops down in steplike fashion between the
elements found lower in the table (see Figure 36).
Figure 36. Location of MetalloidsCHAPTER SUMMARY
The following terms summarize all the concepts and ideas that were introduced in
this chapter. You should be able to explain their meaning and how you would use
them in chemistry. They appear in boldface type in this chapter to draw your
attention to them. The boldface type also makes it easier for you to look them up if
you need to. You could also use the Internet search engine google.com on your
computer to get a quick and expanded explanation of these terms, laws, and
formulas.
acid salt
allotropic form
alloy
basic oxygen furnace
blast furnace
brass
bronze
electric arc furnace
metalloid
normal salt