Question

a covalent bond is denoted by ______ in a lewis dot structure: two dots a straight line a blank space a blue bubble

Explanation:

In a Lewis - Dot structure, a covalent bond is represented by a straight line between the atoms that are bonded. Each line represents a pair of shared electrons. Two dots represent a lone - pair of electrons, a blank space has no significance in representing a bond, and a blue bubble is not a standard symbol in Lewis - Dot structures.

Answer:

B. a straight line