Question

state the two points of similarities and differences between NaCl and Cu metal.

Answer 1

Differences :
1) NaCl is a ionic compound while Cu is element.
2) NaCl crystallizes in FCC while Cu crystallizes in cubic close packed structure.
3) NaCl is white and Cu is reddish brown in colour.
4) NaCl is ionic solid while Cu is metallic solid.

Similarity :
1) Both are crystalline solid.
2) Cu is good electrical conductor. NaCl also conducts electricity in molten state.