A Body-Centered Cubic lattice includes which of the following features?

• A. Atoms at faces
• B. Only corners
• C. An atom at the center in addition to corner atoms
• D. Only edge centers

Answer: (C)

Body-centered cubic lattices have an atom at each corner of the cube and an additional atom right at the center of the cube. This center atom, in addition to the corner atoms, is what makes the BCC structure distinct from other cubic types. When you count atoms per unit cell, the eight corners contribute 1 atom in total (8 × 1/8), and the center adds another 1, giving 2 atoms per unit cell overall. The other descriptions don’t match this arrangement: atoms at faces describe a face-centered cubic lattice, only corners describe a simple cubic lattice, and edge centers aren’t the defining feature of the cubic types. So the statement that there is an atom at the center in addition to corner atoms is the correct description.