2. INTRODUCTION: A
CHEMICAL BOND
• Attraction between atoms that
allows the formation of a chemical
substance
• Formed by the attraction of a
positive and negative ion or by a
positive nucleus and a negative
electron
• Atoms form chemical bonds so
they can become stable also
known as the octet rule
• 3 types ionic, metallic and covalent
3. Form between cations
(positive) and anions
(negative)
Is formed when an electron
takes or receives one or more
valence electron
High melting and boiling
points
Energy involved by this type
of bond is lattice energy
1. Lattice energy- energy
required to break apart the
ions in their lattice
arrangement into the ions
in the gas phase.
4. LEWIS DOT
STRUCTURE
Lewis symbols help us
find the valence
electrons and predict
bonds
5. • Share electrons Molecule- two or more
atoms held together by a
• Single bond- one covalent bond that
electron pair is shared behave as a single unit
between atoms, 2
electrons involved
• Double bond- when
two electrons pairs are
shared. 4 electrons
involved
• Triple bond- sharing
three electron pairs; 6
electrons involved
6. Metal atoms contribute
their valence electrons
to form a “sea of
electrons”
Alloy- is a mixture of two
or more metals
Great conductors of
electricity, they are weak
therefore having high
melting points
7. Elements bond to become stable reaching the
octet rule
3 different types: ionic, covalent & metallic
Ionic bonds give or receive valence electrons
Covalent bonds share electrons
Metallic bonds “sea of electrons”
