Which choice correctly identifies the structure of LiCl, HCl, graphite, and potassium?

The correct identification of the structures of each compound hinges on understanding the nature of the bonding and the arrangement of atoms within each substance.

Lithium chloride (LiCl) is classified as ionic because it is formed from the electrostatic attraction between positively charged lithium ions and negatively charged chloride ions. This means that the structure is organized in a lattice formation typical of ionic compounds.

Hydrochloric acid (HCl) is categorized as molecular. This is due to its composition, which features covalent bonding between the hydrogen and chlorine atoms. In the gas or aqueous state, HCl consists of discrete molecules rather than a continuous network.

Graphite is recognized as a covalent network structure. In graphite, carbon atoms are bonded in a planar structure with strong covalent bonds between them, but layers are held together by weaker van der Waals forces, allowing for uniqueness in its electrical conductivity and lubricating properties.

Potassium is classified as metallic due to its structure, which consists of a lattice of positive metal cations surrounded by a 'sea' of delocalized electrons. This electron mobility in metallic bonds allows for conductivity and maintains the structural integrity of metals.

Thus, option B rightly categorizes LiCl as ionic, HCl as molecular, graphite as cov