# A compound formed by elements X and Y has a cubic structure in which X atoms are at the corner of the cube and two atoms (Y) are at each body diagonal of the cube.(a) Calculate: (i) $Z_{eff}, (ii) total number of atoms in a cube, and (iii) formula of the compound. ## 1 Answer (i) 9,(ii) 16,(iii)$XY_8\$
Hence (A) is the correct answer.