What determines the properties of a metal in terms of crystal structure?

• A. The arrangement of atoms in a crystalline lattice determines properties such as strength and conductivity.
• B. The color of the metal.
• C. The price of the metal.
• D. The magnetic history of the alloy.

Answer: (A)

The structure of a metal at the atomic level is what sets its properties. How atoms pack together in a crystal lattice—and how the electrons are arranged and bonded—determines how easily layers can slide past each other, how strong the material is, and how well electrons can move through it. Different lattice types, like body-centered cubic, face-centered cubic, or hexagonal close-packed, have different packing densities and numbers of slip systems, which explains why some metals are stronger or more ductile and why their electrical conductivity varies. Colors, price, or magnetic history might influence appearance, cost, or magnetic behavior in particular cases, but they do not determine the fundamental mechanical and electrical properties that come from the crystal arrangement itself.