The bonded pair of valence electrons are shown using circles. Hence, option B is correct.
What are unshared electrons?
Unshared or lone electrons are those electrons, which are lone and not shared with another atom when making a covalent bond. These electrons are represented by dots. The valence electron help in making the valence complete of other atoms when forming a bond.
Lewis dot diagrams are simplified representations of a molecule's valence electrons. They show the molecule's atoms, valence electrons and bonding.
Lewis dot diagrams are based on the octet rule. Electrons are shown as dots and covalent bonds are shown as lines.
Lewis dot diagrams are important because they help us predict a molecule's geometry.
The dot represents the unshared/ lone pair of electrons. In a Lewis structure, atoms that are bonded covalently are represented by a single line joining the two atoms, which are represented by the element's chemical symbol. The bonded pair of valence electrons are shown using circles.
Hence, option B is correct.
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