Test Yourself 5.6 (Textbook) – Chemistry Form 4 Chapter 5 (Chemical Bond)


Question 1:
What is meant by a delocalised electron?

Answer:
Mobile electrons that are not owned by any atom or ion.


Question 2:
How a metallic bond is formed in metals?

Answer:
The valence electron of metal atoms can be easily donated and delocalised in solid state. Positively charged metal ions are formed. All delocalised valence electrons can move freely within the metal
structure to form an electron sea. The electrostatic attraction between the electron sea and the positively charged metal ions form metallic bonds.


Question 3:
Using aluminium, Al metal as an example, explain how metals can conduct electricity.

Answer:
Aluminium metal has valence electrons that are easily delocalised to form an electron sea. These delocalised electrons can move freely and carry charges from the negative terminal to the positive
terminal and conduct electricity.