Silicon dioxide exists as ________
A) a covalent network solid.
B) a metallic solid.
C) a semimetallic solid.
D) a molecular solid.
E) All of the above.

Question

Quizplus · Accepted Answer

Silicon dioxide, also known as quartz, has a 3-dimensional covalent network structure made up of silica (SiO2) units, which are connected through covalent bonds. This makes it a covalent network solid, but not a metallic or molecular solid. It is also not semimetallic, as it does not exhibit properties of both metals and nonmetals. Therefore, choice A is the best choice.

Silicon Dioxide Exists as ________