Final answer:
Valence electrons of Si and C are shared in covalent bonding.
Step-by-step explanation:
In a covalent bond, valence electrons are shared between atoms. The number of valence electrons an element has determines how many covalent bonds it can form. For example, carbon (C) has 4 valence electrons, so in a covalent bond, these 4 electrons are shared with other atoms.
Similarly, silicon (Si) also forms covalent bonds by sharing its valence electrons. Silicon has 4 valence electrons like carbon, so it can form 4 covalent bonds as well.