Which mechanism limits the number of covalent bonds that can form around a central silicon atom?

💡 Explanation

When silicon forms covalent bonds, sp3 hybridization occurs because four valence electrons form hybrid orbitals, but steric hindrance amongst large substituents bound leads to crowding. Therefore steric hindrance of hybrid orbitals limits bonding, rather than electronic effects which are significant but less dominant in limiting bond numbers compared to spatial considerations.

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