Topic 9 - 9.1 - Properties of Metals, Metallic Bonding

Question 1

Name 5 properties of metals

Answer 1

1. Sonorous - makes a ringing sound
2. Malleable - can be bent into a shape
3. Ductile - can be drawn into a thin wire
4. Conductors of heat and electricity
5. Shiny

Question 2

What is the structure of metals?

Answer 2

Crystal

Question 3

How are most metals malleable or ductile?

Answer 3

They consist of layers of ions that can slide over each other when the metal is bent, hammered or pressed.

Question 4

Define Metallic Bonding

Answer 4

The electrostatic force of attraction between positive metal ions and delocalised electrons that holds metal atoms together
E.g. Gold

Question 5

What is the purpose of the delocalised electrons that are present in metals?

Answer 5

• Attracts the positive ions, holding them together
• Balances the repulsion between positive ions, stopping them from being pulled/forced apart.

Question 6

Describe the relationship between the number of outer electrons a metal has and its melting and boiling points

Answer 6

Greater number on outer electrons = Higher melting/boiling point
* due to the increased +ve charge on the metal ion and the increased number of electrons that are delocalised = stronger bonding.