Which of the following solid substances contains positive ions immersed in a sea of mobile electrons?
a) O2 b) Cu c) CuO d) SiO2

Cu

Explanation:

In metallic bonds,the valence electrons from the s and p

orbitals of the interacting metal atoms delocalise i.e,

instead of orbiting their respective metal atoms, they

form a sea of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.

wher is the rest of the question