2. What is Chemical
Bonding?
• The joining of atoms to form new
substances.
• Chemical Bond- a force of attraction
that holds two attractions together.
3. Electrons
• Electrons are the same number as protons.
• Valence electrons-are the electrons on the
outermost shell.
4. How many valence electrons
do each group have?
• In Groups 1 & 2 there are the same number
of valence electrons as their group number.
• In groups 3-12 there is no general rule
relating their valence electrons to the group
numbers
• In groups 13-18 the number of valence
electrons is 10 fewer that the group number.
5. Overflowing Valence
Shells
• Atoms need to fill their outermost levels.
• Atoms are more reactive when they fewer
than 8 electrons in their outer shell.
6.
7. Types of Chemical Bonds
• Ionic-the force of attractions between
oppositely charged ions.
• Ions-are charged particles that form
during chemical changes when one or
more valence electrons transfer from
one atom to another.
8.
9. Covalent Bonds
• The force of attraction between the
nuclei of atoms and the electrons
shared by the atoms.
10.
11. Metallic Bonds
• The force of attraction between
positively charged metal ion and the
electrons in a metal.
