9. This type of bond consists of closely packed cations and loosely held valence e- rather than neutral atoms.
a. lonic
b. Covalent
c. Metallic
d. polyatomic

Metallic bonds

Explanation:

Metals consist of closely packed cations and loosely held valence electrons rather than neutral atoms. The valence electrons of atoms in a pure metal can be modeled as a sea of electrons. Metallic bonds are the forces of attraction between the free-floating valence electrons and the positively charged metal ions.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

answer; talc and gypsum;