Alloys Feature Mixed Atomic Arrangements

Steps:

• Define alloy as a homogeneous mixture of two or more metals with irregular atomic structure.
• Examine diagrams for substitutional or interstitial arrangements of different metal atoms.
• Eliminate options showing uniform or non-metallic lattices.
• Select the diagram depicting blended metal atoms in a crystal lattice.

Why A is correct:

• A illustrates a substitutional alloy structure where atoms of different elements occupy lattice sites, matching the definition of metallic solid solutions.

Why the others are wrong:

• B shows a regular lattice of identical atoms, typical of a pure metal.
• C depicts an ordered ionic compound with distinct cation-anion arrangement.
• D represents a molecular structure with discrete units, not metallic bonding.

Final answer: A