Chemical bonding

Class topic: bonding of atoms

Key points: 1. Know the difference between covalent and ionic bonding

2. Using the ΔEN to distinguish ionic and covalent bond.

Key Vocabulary: electronegativity

Knowledge warm up:

1. Electrons are _____ in ionic bond

2. Electrons are _____ in covalent bond

Main knowledge:

1. Every atom has a specific electronegativity value.

With this value, we can determine the bond type.

Note: Polar covalent is also covalent bond, but with a few partial charge.

2. Distribution of partial charges in a polar covalent bond:

(Bonds with positive and negative ends)