Question

Which statement about copper, diamond and silicon(IV) oxide is correct?
1.Copper and silicon(IV) oxide have similar electrical conductivity.
2.In diamond the carbon atoms are covalently bonded as flat sheets.
3.In silicon(IV) oxide the silicon and oxygen atoms are covalently bonded as flat sheets.
4.The structure of copper includes a lattice of positive ions.

Answer 1

4. The structure of copper includes a lattice of positive ions.

Explanation:

• Copper is solid metal and its structure is can be described as a lattice of positive ions in a sea of electrons.
• Because of this structure, it has high electrostatic attraction between the positive ions and electrons.
• Hence option 4 is correct.