Answer:
Polar covalent bond
Explanation:
In silicon dioxide covalent bond is present. The electronegativity of silicon is 1.9 while that of oxygen is 3.5 thus electronegativity difference is 1.6. Because of this electronegativity difference bond is polar covalent bond.
Covalent bonds are formed as a result of sharing of electrons between atoms.
Silicon atom is covalently bonded with oxygen atom. The geometry of SiO₂ is tetrahedral.
The oxidation state of silicon is +4 while the oxidation state of oxygen is -2. Silicon does not form double bond that's why this is present in network and four oxygen atoms are attached with one silicon atom or we can say that one oxygen atom is shared by two silicon atom.
Silicon dioxide is crystalline in nature and having high melting point.
