# Need help, can't tell if I just do t understand or if the question is busted....

###### Question:

Need help, can't tell if I just do t understand or if the question is busted.
several pairs of conditions are desribed below. For each, choose the condition for which you expect to have the highest activiation energy for diffusion. vacancy diffusion. an FCC structure with 0.74 packing factor. diffusion of copper in berylium. a metal with a low melting point. (a 6. Diffusion of Me2" ion in Mgo versus 4, Diffusion of berylium in copper versus O2 lion in Mgo. 3. A metal with a high melting point versus 5. An ionically bonded material versus 2. A BCC structure with 0,68 packing factor versus 1. Interstitial diffuslon versus a metallica bonded material

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