Great graphics depicting how electronegativity affects bond type and Lewis structure of compounds, including a table comparing/contrasting ionic, covalent and metallic bonds with a guided notes, blank chart for students.

1. Difference in Electronegativity Affects the Bond Type
Electronegativity differences between bonding elements is used to predict the bond type.
H2 – Electronegativity difference = 2.20 – 2.20 = 0 so a Covalent bond is formed.
HF – Electronegativity difference = 4.00 – 0.96 = 3.04 so an Ionic bond is formed
ELECTRONEGATIVITY DIFFERENCE
Ionic Bonds
• Held together by
electrical attraction
•Strong; hard to break
Covalent Bonds
• Held together by
shared electrons
• Not as strong

2. 4 Step Process: Drawing Lewis Dot Structures
Key consideration – The octet rule
Step 1: Arrange atoms
• Central atom lower electronegativity
Step 2: Add up the valence electrons of all atoms
Step 3: Draw single bonds
• Subtract 2 electrons for each single bond from
total counted in Step 2
Step 4: Deal out remaining electrons
• Satisfy octet rule (except for Hydrogen)

4. Comparing and Contrasting Ionic and Covalent
Bonds
Ionic Bond
Electrons
Bond
Electronegativity
Differences
State
Melting Pt.
Conductivity
Water Solubility
Covalent Bond