Bell Ringer
Write down HW
Bell Ringer
• What is a covalent bond?
• Draw the lewis dot structure for
• phosphorus
• What 2 classes of elements tend to form
covalent bonds?
Unit 3: Chemistry. Drawing Lewis Dot Models.
**These models only show VALENCE ELECTRONS.
1. Write the symbol of the
element
2. Find out how many
valence electrons the
element has and place
them around the atom
in pairs of 2
Unit 3: Chemistry. Drawing Lewis Dot Models PRACTICE.
Neon
Bismuth
Boron
Unit 3: Chemistry. Covalent Bonding.
… sharing is Caring!
Unit 3: Chemistry. COVALENT BONDING.
What is a covalent bond?
Atoms share one or more electrons with each other
to form the bond.
Each atom is left with a complete outer shell.
A covalent bond forms between two non metals
Unit 3: Chemistry. COVALENT BONDING.
Example C1: Hydrogen + Hydrogen
Example C2: 2 Hydrogen + Oxygen
Unit 3: Chemistry. COVALENT BONDING.
Example C3: Chlorine + Chlorine
Example C4: Oxygen + Oxygen
Example C5: Carbon + 2 Oxygen
Example C6: Carbon + 4 Hydrogen
Unit 3: Chemistry. IONIC BONDING.
What is an ionic bond?
Atoms will transfer one or more electrons to another
to form the bond.
Each atom is left with a complete outer shell.
An ionic bond forms between a metal ion with a
positive charge and a non metal ion with a negative
charge.
Unit 3: Chemistry. IONIC BONDING.
Example B1: Sodium + Chlorine
Example B2: Magnesium + Iodine
Unit 3: Chemistry. IONIC BONDING.
Example B3: Potassium + Iodine
Example B4: Sodium + Oxygen
Example B5: Magnesium + Chlorine
Example B6: Aluminum + Chlorine