Electrons, bonding and structure

Which of the following correctly pairs a solid substance with the primary electrostatic attraction that is overcome when the substance melts?

Iodine ( $I_2$ ): electrostatic attraction between a shared pair of electrons and the nuclei of the iodine atoms

Magnesium ( $M g$ ): electrostatic attraction between positive metal ions and delocalised valence electrons

Silicon dioxide ( $SiO_2$ ): intermolecular dipole-dipole forces between polar molecules

Sodium chloride ( $N a C l$ ): electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms

Electrons, bonding and structure Questions

Which of the following correctly pairs a solid substance with the primary electrostatic attraction that is overcome when the substance melts?

Iodine ( $I_2$ ): electrostatic attraction between a shared pair of electrons and the nuclei of the iodine atoms

Magnesium ( $M g$ ): electrostatic attraction between positive metal ions and delocalised valence electrons

Silicon dioxide ( $SiO_2$ ): intermolecular dipole-dipole forces between polar molecules

Sodium chloride ( $N a C l$ ): electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms