Final answer:
The simple cubic structure is not commonly found in metals; many crystallize in a face-centered cubic configuration, which has a different arrangement of atoms within the unit cell.
Step-by-step explanation:
The statement that simple cubic structures are commonly found in metals is false. Many metals, including aluminum, copper, and lead, actually crystallize in a face-centered cubic (FCC) configuration, which is different from the simple cubic structure.
In the FCC arrangement, a cubic unit cell has atoms at all corners and the centers of each face. A single FCC unit cell contains four atoms, calculated by combining one-eighth of an atom from each of the eight corners and one-half of an atom from each of the six face centers.
Other common structures for metallic elements include body-centered cubic (BCC) and FCC, rather than the simple cubic structure, which is less common in metals.