So-called “designer solvents” named for this term are functionalized to make them task-specific. In the Debye–Hückel limiting law, the natural logarithm of the mean activity coefficient is proportional to the square root of a quantity named for this term. (10[1])The quantity (10[1])“square root of 12 over 12 minus coordination number, all minus one” defines the critical value of the ratio in compounds described by this term (10[1])written (10[1])as “r-sub-C over (10[1])r-sub-A.” This term names room-temperature liquids such as BMIM-PF6 (10[1])and EMIM. (10[1])Compounds described by this term are described by Pauling’s five (10[1])rules. (10[1])The Born–Haber cycle (-5[1])calculates the lattice energy of compounds (10[4]-5[1])described by this term. (10[1]-5[1])For 10 points, name this term (-5[1])that describes bonds between two (10[3])oppositely (10[3])charged (10[2])species (10[10]-5[2])such as (10[2])sodium (10[1])and chloride. (10[5])■END■ (10[10]0[1])