Quartz, SiO2, is the most common mineral found on the surface of the earth. What is the best explana — States of Matter Chemistry Question
Question
Quartz, SiO2, is the most common mineral found on the surface of the earth. What is the best explanation for the fact that quartz is hard and has a high melting point?
A.✓ Correct
Quartz crystals are extended structures in which each atom forms strong covalent bonds with all of its neighboring atoms.
B.
Quartz crystals consist of positive and negative ions that are attracted to one another.
C.
Quartz crystals are formed under extremes of temperature and pressure.
D.
Silicon and oxygen atoms are especially hard because of their electronic structure.
💬
Still have doubts about this question?
Practice more questions like this, completely free.