# What is the most desirable oxidation state of silicon as an atom?

Well it is probably as quartz, $S i {O}_{2}$.
So what is the oxidation state of silicon in quartz? Clearly it is $+ I V$. Its Group 4 congener, $C$, forms carbon dioxide, $C {O}_{2}$, whose sublimation point is $- 78$ ""^@C. Silicon dioxide has a boiling point of $2950$ ""^@C. How do you account for this difference?