A covalent bond involves sharing of electrons .
So, option D is correct one .
When two atoms share one or more pairs of electrons, a covalent link is created. A covalent bond is created when the difference between the electronegativities of two atoms is too small for an electron transfer to occur and produce ions.
The strongest covalent bonds are quadruple covalent bonds. The bond gets stronger the more bonding partners there are. The sharing of electrons between two species creates a covalent connection. They frequently exist between molecules with comparable electronegativities.
The strength of the bonds between the atoms is based on their quantity.
Covalent bonds can be single, double, triple, or quadruple.
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