How is the crystal lattice of an ionic compound different from the crystal formation of a metallic compound? Select all that apply.

A. An ionic compound has a rigid crystal structure with positive and negative ions fixed in place based on attractive forces.
B. A metallic compound forms a crystal structure with overlapping valence atomic orbitals and has delocalized electrons that are free to move around.
C. An ionic compound has a rigid crystal structure because of the repulsive forces between the negative ions that are sharing the electrons.
D. A metallic compound forms a crystal structure because the transferred electrons have an attractive force on the negative ions in the metal nuclei.