The Covalent Bond Section 2.

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Presentation transcript:

The Covalent Bond Section 2

Remember the Octet Rule!

What if both atoms need valence electrons?

Covalent Bond Shared electrons Part of BOTH atoms’ valence shells Between NONMETALS

3 Types of Covalent Bonds Single Double Triple

Single Bond 1 pair (or 2 electrons) shared between two atoms

Double Bond 2 pairs (or 4 electrons)

Triple Bond 3 pairs (or 6 electrons)

Strength of Covalent Bond Closer the nuclei, stronger the bond Triple bonds have the SHORTEST bond length

Lewis Structure Electron-dot diagrams for molecules Dots represent lone pairs of electrons A line represents shared electrons

Steps to Lewis Structures Count your electrons Pick your center (furthest left that’s not H) Attach everything else to the center Fulfill outer octets first Fulfill inner octets last If you run out of electrons: use a double or triple bond

Examples HF H2O NH3 CCl4 PCl5 SF6

Homework Lewis Structure Worksheet