C3 Ionic Bonding, Metallic Bonding And Structure

Question 1

Describe the structure of metallic bonding

Answer 1

Positive metal ions in a ‘sea’ of delocalised electrons

Question 2

Difference between pure metals and some alloys

Answer 2

Pure metals are softer as layers of metals can slide whereas uneven size of positive ions in an alloy prevents this.

Question 3

Metals characteristics

Answer 3

• Can conduct electricity - delocalised electrons
• Pure metals malleable / Alloys hard
• High melting point - strong electrostatic attraction hard to overcome

Question 4

Ionic bonding occurs between what substances

Answer 4

A metal and non-metal

Question 5

Characteristics of ionic bonds

Answer 5

• Conduct electricity when a liquid or aqueous (ions free to move and carry a charge)
• High melting points (strong electrostatic force is hard to overcome)