Based on the physical properties described, arsenic is best classified as a C. metalloid. It exhibits some characteristics of metals (like being a solid and having a metallic luster) but also has nonmetal-like reactivity.
1pt
The four examples often used for categories of elements are metals, nonmetals, metalloids, and rare-earth elements.
Arsenic is element number 33 on the periodic table. It is a brittle, silver-gray solid at room temperature and is reactive with oxygen. There are no unique properties observed such as magnetism or luminescence. Based on these physical properties, what class of element is arsenic?
A.
metal
B.
rare-earths
C.
metalloid
D.
nonmetal
1 answer