describe a covalent bond. identify the parts of a covalent compound diagram. draw a stick diagram of...
DESCRIPTION
Remember… Ionic bond – Bond formed by the transfer of electrons – Between a metal and nonmetal K Cl CationAnion 1+ 1-TRANSCRIPT
CATALYST• Describe a covalent
bond.• Identify the parts of a
covalent compound diagram.
• Draw a stick diagram of a covalent compound.
Name the following ionic compounds:
OBJECTIVESDATE: 02/03/2015
1. Ni2CO3
2. Fe(SO3)2
3. FeBr3
4. K2SO4
Reminders• Polyatomic QUIZ - Monday
Remember…• Ionic bond–Bond formed by the transfer of
electrons–Between a metal and nonmetal
K ClCation Anion
1+ 1-
Covalent Bond• Covalent bond–Bond formed by the sharing of valence
electrons–Between 2 or more nonmetal elements–Atoms will share electrons so that they
obtain 8 electrons in their outermost orbital.
7 valence electrons
7 valence electrons
8 valence electrons 8 valence electrons
Remember Lewis Dots…• Draw Lewis dots for the following
atoms…
O N F H C
6 5 7 1 4
Covalent Compound Diagrams• Diagrams that show how atoms in a
molecule are covalently bonded together• Every line = 2 electrons being shared
Parts of Covalent Compound Diagram
Central Atom
Parts of Covalent Compound Diagram
Single Bond
Parts of Covalent Compound Diagram
Lone Pair
Steps to Drawing DiagramStep 1:
Arrange the atoms into a skeleton structure.a. least electronegative element goes
in the centerb. Hydrogen goes on the outside.c. Carbon goes in the center.
Example 2: AsCl3
As ClClCl
Steps to Drawing DiagramStep 2:
Draw the _______ _____ diagram for each atom.
Lewis dot
Example 3: AsCl3
As ClClCl
Part 2: Steps to Drawing Diagram
Step 3:Draw a line to connect the single electrons between the central atom and the surrounding atoms.a. Each line represents 2 electrons
being shared.
Example 4: AsCl3
As ClClCl
Example 5: AsCl3
As ClClCl
Steps to Drawing DiagramStep 4:
Count to make sure all valence electrons are accounted for in the diagram.
Step 5:Check to make sure all atoms satisfy the octet rule.a. If needed, more than 2 electrons may
be shared between 2 atoms.
As ClClCl
Example 6: AsCl3
8 valence
8 valence
8 valence
8 valence