Statement I: Atomic solids having a particular type of unit cells have fixed density irrespective of — Solid State Chemistry Question

💡 Solution & Explanation

Statement I is incorrect because density depends on the molar mass and atomic radius of the element, which vary. Statement II is correct because the packing fraction of a unit cell type (e.g., 68% for BCC, 74% for FCC) is purely geometric and depends only on the arrangement of spheres, not their chemical identity.