Question 1: Define delocalized electrons in the context of metallic bonding.

Answer: Electrons in a metal that are not bound to any specific atom but are free to move throughout the metal structure.

Question 2: Explain how the presence of delocalized electrons affects the electrical conductivity of metals.

Answer: Delocalized electrons are free to move throughout the metal, allowing electric charge to flow easily, which enhances conductivity.

Question 3: Describe the mechanism by which delocalized electrons contribute to the malleability of metals.

Answer: Delocalized electrons can move around fixed positive metal ions, allowing layers of atoms to slide past each other without breaking bonds, making metals malleable.

Question 1: Calculate the amount of electrical charge (in Coulombs) carried by 5 grams of copper (Cu) atoms, given that 1 mole of copper (63.55 g) contains 6.02 x 10^23 atoms, and each atom contributes one delocalized electron.

Answer: 2.4 Coulombs

Question 1: Identify two safety precautions that should be observed when handling molten metals in industrial processes involving metallic bonding.

Answer: Wearing heat-resistant gloves and safety goggles to prevent burns and eye injuries.

Question 2: Describe a simple experimental setup to demonstrate the high electrical conductivity of a metallic wire.

Answer: Connect a metallic wire in a circuit with a battery and a bulb. When the circuit is complete, the bulb lights up, demonstrating electrical conduction through delocalized electrons in the metal.

Question 1: A consumer electronic device uses copper wiring. If the resistance of 1 meter of copper wire is measured at 0.017 ohms, explain how delocalized electrons contribute to this low resistance.

Answer: Delocalized electrons in copper facilitate easy movement of charge, resulting in low electrical resistance and efficient conduction.

Question 1: Explain why aluminium is widely used in the manufacture of aircraft structures, considering its metallic bonding properties.

Answer: Aluminium has delocalized electrons that give it good electrical conductivity and malleability, plus its low density makes it ideal for aircraft structures.

Question 2: Discuss how the property of malleability resulting from delocalized electrons benefits the production of consumer cutlery.

Answer: Delocalized electrons allow metal atoms to slide past each other without breaking bonds, enabling the metal to be shaped into utensils without cracking or breaking, making cutlery durable and easy to manufacture.