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