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31. Antimony is like a nonmetal in that it is a brittle, crystalline solid, has poor electrical and heat conductivity, and has a low boiling point. However, it is also like a metal because of its shiny silver appearance and ability to form alloys. Into which group should antimony be placed? 32.
A diagonal line of elements separates the metals from the nonmetals. These are called. metalloids. The metalloidsâelements like boron, silicon, and antimonyâhave some. properties of metals and other properties of nonmetals. When you think of nonmetals, you might think of materials made of plastic or polystyrene.