Why does copper have a higher melting point than aluminium?

  • #1
Why does copper have a higher melting point than aluminium? Why does the melting point increase as you go down groups anyway?
Aluminium has higher charge (+3) and a smaller radius, meaning that there is a higher charge density and thus stronger forces of attraction to the lattice. While copper has a charge of +1 and a bigger radius. However, Copper has a higher number of protons, or a stronger positive charge in the nucleus, is this the reason ?
 

Answers and Replies

  • #3
Borek
Mentor
28,979
3,612
Aluminium has higher charge (+3)

Metallic aluminum has no charge and consists of neutral atoms.
 

Related Threads on Why does copper have a higher melting point than aluminium?

Replies
9
Views
42K
Replies
1
Views
3K
Replies
19
Views
8K
  • Last Post
Replies
3
Views
11K
  • Last Post
Replies
7
Views
2K
Replies
5
Views
4K
  • Last Post
Replies
13
Views
10K
  • Last Post
Replies
3
Views
2K
Replies
21
Views
4K
Replies
2
Views
7K
Top