U3-1-1 - Metallic Bonding and Reactivity

Question 1

Describe the structure of a metal lattice

Answer 1

Positive metal ions surrounded by delocalised electrons

Question 2

Metallic bond

Answer 2

Electrostatic attraction between positive metal ions and delocalised electrons

Question 3

Displacement reaction

Answer 3

A reaction in which a more reactive metal displaces a less reactive metal from a compound.

E.g. Mg + FeSO₄ → MgSO₄ + Fe

Question 4

What allows metals to conduct electricity?

Answer 4

Delocalised electrons

(charged particles + free to move)

Question 5

Why must a d.c. supply be used during electrolysis?

Answer 5

So that the products can be identified.

Otherwise, a mix of products is made at each electrode