The boundary atoms in the crystal on the _____ of the boundary are more tightly bound than the boundary atoms in the crystal in the _____

The boundary atoms in the crystal on the _____ of the boundary are mor

1.	The boundary atoms in the crystal on the _____ of the boundary are more tightly bound than the boundary atoms in the crystal in the _____
A.	concave side, convex side
B.	convex side, concave side
C.	surface, inner side
D.	surface, concave side
Answer» B. convex side, concave side