Which term explains the geometric shape of a well-formed crystal?

Which term explains the geometric shape of a well-formed crystal?

• A. Crystalline
• B. Crust
• C. Crystal shape (form)
• D. Crystal planes

Answer: (C)

Crystal form describes the geometric shape of a well-formed crystal—the external faces and overall three-dimensional outline that come from its internal arrangement of atoms. This term captures the outward shape you can observe, reflecting the symmetry and growth habits of the crystal. By contrast, crystalline refers to the material’s internal order, crust isn’t related to shape, and crystal planes are the individual faces that make up the form, not the whole outline. So the best term for the outward geometry is crystal form.

Crystal form describes the geometric shape of a well-formed crystal—the external faces and overall three-dimensional outline that come from its internal arrangement of atoms. This term captures the outward shape you can observe, reflecting the symmetry and growth habits of the crystal. By contrast, crystalline refers to the material’s internal order, crust isn’t related to shape, and crystal planes are the individual faces that make up the form, not the whole outline. So the best term for the outward geometry is crystal form.