# What is the oxidation number of Si (silicon)?

Jun 26, 2016

Elemental silicon has a formal oxidation state of $0$.
Of course, silicon IN ITS COMPOUNDS, as a carbon analogue, usually has an oxidation state of $+ I V$.
I use the formal definition of oxidation state/number: $\text{the charge left on the central atom, when all the bonding}$ $\text{electrons are removed with the charge retained by the }$ $\text{more electronegative atom}$.
As the element, $S i$ has neither donated nor accepted electrons, and therefore it is zerovalent; i.e. it has a formal $0$ oxidation state. What is the oxidation state of silicon in $S i {F}_{4}$; in $S i {H}_{4}$; in Si(CH_3)_4??