
Metallic Bonds
Presentation
•
Science, Chemistry
•
7th - 11th Grade
•
Practice Problem
•
Medium
Used 14+ times
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10 Slides • 12 Questions
1
Metallic Bonds
Dr Ahmed
2
Metallic Bonds
Secure metallic bonding in diagrams
Describe the metallic bond
Explain how metal atoms form metallic bonds
3
Quick recap on bonding so far...
4
Multiple Choice
What is the charge on an oxygen ion?
+2
+1
-2
-1
5
Open Ended
How does an atom become an ion?
6
Open Ended
List some properties of ionic compounds
7
Multiple Choice
Why do small covalent molecules have low boiling and melting points?
Covalent bonds are weak
They have weak intermolecular bonds
They are very small so have less bonds
Ionic bonds are strong
8
Multiple Choice
HCl has what kind of bonding?
Ionic
Simple Covalent
Metallic
Giant covalent
9
Multiple Choice
NaCl has what kind of bonding?
Ionic
Simple Covalent
Metallic
Giant covalent
10
Multiple Choice
Fullerene has what kind of bonding?
Ionic
Simple Covalent
Metallic
Giant covalent
11
Definition
Metallic bonding is the strong attraction between closely packed positive metal ions and a 'sea' of delocalised electrons.
12
Properties of metallic bonds
Once the metal atom loses electrons they move randomly
13
Properties of metallic bonds
If you apply an electric current the electrons can carry the charge through the solid metal.
Metallic bonds CAN conduct electricity
14
Properties of metallic bonds
Atoms are arranged in a regular arrangement
Once hit they can therefore move
This is why metals are MALLEABLE
Metals are also DUCTILE
15
Open Ended
Write a list completing each word to describe the properties of metals:
Metals are:
S_____
C_____ E______
H____ M_______ P________
M________
D________
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So how do we strengthen metals??
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Alloys
An alloy is a mixture of a metal with another element
This can be another metal or a non-metal (usually carbon)
The disorderly arrangement makes the metal less malleable and much stronger.
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Quick Task - Google some uses of alloys. In the Teams chat write down what the alloy is made of and what it is used for. You've got 5 mins
19
Multiple Choice
Metallic bonds are held together by...
The attraction of positive and negative ions
Sharing electrons
The attraction of positive ions to a sea of delocalised electrons
Tranfer of electrons
20
Open Ended
Describe why metals are malleable and ductile
21
Open Ended
Why are metals good conductors of heat and electricity?
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Open Ended
Explain why Alloying a metal makes it stronger.
Metallic Bonds
Dr Ahmed
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