2 . W/'S Fonts | Previous AnSHUTS M E GUI BENCH EMI ``L ``'L L.FEIST.`12 . In modeling solid - state Structures , atoms and ians are most often modeled as spheres . A structure built using Spheres Will have some Empty , or void , Space in it . A Measure* of void Space in a particular structure is the packing Efficiency , defined as the Volume Occupied by the Spheres divided by the total Volume of the structure . Given that a solid crystallizes in a body centered cubic structure that is 3. 49 & On Each Side, answer questions ( a) ( !) . ( 1 4 = 1. $ 10 -20' m .] ( a) How many total atoms are there in each unit cell ?" 2 stomi's! ` ) What is the volume of one unit cell in A ` ? ``42.5 4\\ $25 4 7 [) Assuming that the stars are Spheres and the radius of each sphere is 1. 51 A, what is the volume of one atom in #`? ( V'spre= = 4 / 3 7-7 . ] \\14. 4 AJ [`) Therefore , what Volume of atoms are in one unit cell ?" ZEE A ] {} Based on Your results from parts it's and I'd'j , what is the packing Efficiency of the solid Expressed as a percentage ?" GTE 9'`