Which statement describes copper? O A. Copper is an insulator because its valence electrons can move freely from atom to atom.
O B. Copper is a conductor because its valence electrons can move freely from atom to atom.
O C. Copper is an insulator because its innermost electrons are shared between atoms.
O D. Copper is a conductor because its innermost electrons are shared between atoms.​

See explanation

Explanation:

First of all, we must remember that this compound bears a striking similarity to N2H4 (hydrazine). It must be a chlorine analogue of hydrazine.

Hydrazine is a covalent molecule, hence N2Cl4 must also be a covalent compound. It is formed by the reaction; N2 + 2Cl2 → N2Cl4 and is trivially called tetrachlorohydrazine. Generally, hydrazines contain the N-N  single bond in inorganic compounds.

Systematically, the name is dinitrogen tetrachloride because it contains two nitrogen atoms directly bonded to each other. Each of the nitrogen atoms is bonded to two other chlorine atoms making a total of four chlorine atoms in the molecule.