SrF₂ Crystallizes Such That the Sr²⁺ Ions Are in a Face-Centered

Multiple Choice

SrF₂ crystallizes such that the Sr²⁺ ions are in a face-centered cubic arrangement and the F^- ions are in the holes of the lattice (fluorite structure) . How many F^- ions are present in one unit cell of this crystal

A) 1
B) 2
C) 4
D) 6
E) 8