1. Chapter 5 The Structure of Matter
Section 2/3
Ionic and Covalent Bonding

2. Objectives
Types of bonding
Naming

3. I. What holds bonds together?
A. Attraction of the valence electrons
B. 8 valence electrons for stability
II. Ionic bonds (attraction of charges)
A. There is a transfer of electrons and
the resulting opposite charges bond them
B. Creates a network of atoms in a regular
pattern – very strong

4. C. Properties
1. Melting point is >300° C
2. Conduct electricity when melted
D. Usually occurs between a metal and
non-metal

5. III. Metallic
A. Occurs between two metals
B. The electrons of one atom are
attracted to the nucleus of another
C. Electrons overlap – they can move
freely and easily among atoms
1. Conduct electricity and heat very
well (gold is the best conductor)
2. Flexible bonds – they slide over
each other

6. IV. Covalent Bonds
A. Usually between two non-metals
B. Share electrons between two atoms C. Lower melting points - <300° C ,
Weaker bonds

7. V. Polyatomic ions
A. Group of bonded atoms acting like
one ion (e.g.- SO4-2)
B. In a formula, consider it as one
element

8. Ch. 4 Review/ Properties Worksheet
Homework
Naming
Ch. 4 Review/ Properties Worksheet