Consider an ionic crystal consisting of a pair of oppositely charged ions. The cation specie has a valence of +1, a radius of 0.11 nm, and an atomic mass of 40 g/mol. The anion specie has a valence of -2, a radius of 0.16 nm, and an atomic mass of 69 g/mol. The force of attraction in N (i.e., Newtons) between two oppositely charged ions is given by the following equation: (9 x 10+9 v-m/c) (e|z|)(e||) 2 F = In this equation: e = charge of an electron = 1.602 10-19 C; Z1,2 = cation and anion valences; r = distance between ions; (V-C) 1 = 1 N m D What is the coulombic force of attraction between the cation and the ion in units of N (1.e., Newtons)? 6.34e-27 N Use scientific notation (e g., 1.01e-02 N, e must be lowercase; must include units) X