Transcript Ionic bonding lesson objective:

Using the
cards –
Match up the
element’s
symbol with
its atomic
structure
Ionic bonding
lesson objective:
To understand how ionic bonding occurs
Btec -Working towards
pass
merit
distinction
between atoms
Lesson outcomes:
1. Draw dot and cross diagrams to
show ionic bonding
2. Describe the properties of an ionic
compound.
3. Explain how an ionic bond forms.
Bonding basics
Complete the chart using your atomic structure cards
Element
Lithium
Number of
electrons
3
Beryllium
1
Group
number
1
2
5
8
Fluorine
Number of
electrons
on outside
shell
3
6
Easy to lose
or gains and
an electron?
Bonding basics
Complete the chart using your atomic structure cards
Element
Lithium
Beryllium
Number of
electrons
3
Number of
electrons
on outside
shell
1
Group
number
Easy to lose
or gains and
an electron?
1
lose
2
lose
3
3
lose
atom 2
gains
4Whenoranloses
an
Electron it is
called an Ion
Boron
5
Oxygen
8
6
6
Gain
Fluorine
9
7
7
Gain
Ionic Bonds
• Ionic bonds are formed by one atom
transferring electrons to another atom to
form ions.
• Ions are atoms, which have lost or
gained electrons and therefore have a
negative or positive charge
• The atom losing electrons forms a positive
ion and is usually a metal.
Sodium atom
+
+
+
+
+
+
+
+
+
+
+
-
• The atom gaining electrons forms a negative
ion and is usually a non-metallic element.
+
+
+
+
+
+
+
+
+
+
-
+
+
+
+
+
+
+
+
-
XXXX
X
X
XX
X
X X
X X
X X
XX
Chlorine atom
Sodium atom
Chlorine atom
Electron
transfer
XXXX
X
X
XX
X
X X
X X
+
-
Loses
electron
Gains
electron
Positive and negative ions
attract
X X
XX
Ionic
bonding
Sodium Chloride
XXXX
X
X
XX
-
+
Positive and negative ions
attract
X
X X
X X
X X
XX
Answer these questions:
NEGATIVE
An atom that gains one or more electrons will have a ____________________
charge.
POSITIVE
An atom that loses one or more electrons will have a ____________________
charge.
ION
An atom that gains or loses one or more electrons is called an ____________.
What is an ionic bond?
ELECTRONS to another to form the bond.
Atoms will transfer one or more ________________
Each atom is left with a ________________
COMPLETE outer shell.
An ionic bond forms between a ___________
METAL ion with a positive charge and a
________________
NONMETAL ion with a negative charge attracting each other.
Example: Sodium + Chlorine
XXXX
X
X
XX
Sodium chloride
X
X X
X X
X X
XX
Games for learning –
dominoes
Which domino below will match
Chlorine?
Sodium chloride
Which domino below will
match oxygen?
Sodium chloride
Lithium oxide
Groups
1
Groups
2
3
4
5
6
7
0
The periodic
table
for ionic
bonding
Metals
Non metals
What's wrong?
Li
Ca
Li
Li
Ca
Li
Li
Li
Li
Li
S
Mg
Mg
S
Mg
Ca
Mg
Ca
S
S
Ionic bonding
lesson objective:
To understand how ionic bonding occurs
Btec -Working towards
pass
between atoms
Lesson outcomes:
Draw dot and cross diagrams to show
ionic bonding
Ionic bonding
lesson objective:
To understand how ionic bonding occurs
Btec -Working towards
merit
between atoms
Lesson outcomes:
Draw dot and cross diagrams to
show ionic bonding and describe
the properties of an ionic
compound.
Ionic bonding
lesson objective:
To understand how ionic bonding occurs
Btec -Working towards
between atoms
Lesson outcomes:
Draw dot and cross diagrams to show
ionic bonding and describe the
properties of an ionic
compound.
distinction
Explain how an ionic bond forms.
Metal
Non
Metal
Compound
Ion