Praxis II: Biology Content Knowledge Exam Prep

Answer: D, In a double bond, two atoms share 4 electrons. Double bonds are stronger and shorter than single bonds.

Key Takeaway: In covalent bonding, bond order is the number that defines how many electrons are shared between two atoms. The number of electrons shared defines what type of bond is formed. If two elements share 2 electrongs, the the bond is a single bond. If two elements share 6 electrons, the bond number is three and the type of bond formed is a triple covalent bond.