Geometric shape of a well formed crystal?

Geometric shape of a well formed crystal?

• A. Crystal Systems
• B. Crystal Shape
• C. Crystal Planes
• D. Crystal

Answer: (B)

The main idea is crystal habit—the external geometric form a well-formed crystal tends to take. This shape, the overall arrangement of its visible faces, is determined by the internal arrangement of atoms in the crystal lattice and the conditions under which the crystal grows. Saying “Crystal Shape” directly names this external form, which is exactly what the question asks for. Crystal systems refer to the lattice symmetry and parameters that define how the unit cell repeats in space, which influences possible shapes but is not the observed external form itself. Crystal planes describe the internal arrangement of planes of atoms within the lattice and are more about internal structure and how planes intersect or dissect the crystal, not the overall exterior shape. Calling the object simply a crystal is too general and does not identify the external geometric form. So, the best answer is Crystal Shape because it specifically identifies the visible, external geometry of a well-formed crystal.

The main idea is crystal habit—the external geometric form a well-formed crystal tends to take. This shape, the overall arrangement of its visible faces, is determined by the internal arrangement of atoms in the crystal lattice and the conditions under which the crystal grows. Saying “Crystal Shape” directly names this external form, which is exactly what the question asks for.

Crystal systems refer to the lattice symmetry and parameters that define how the unit cell repeats in space, which influences possible shapes but is not the observed external form itself. Crystal planes describe the internal arrangement of planes of atoms within the lattice and are more about internal structure and how planes intersect or dissect the crystal, not the overall exterior shape. Calling the object simply a crystal is too general and does not identify the external geometric form.

So, the best answer is Crystal Shape because it specifically identifies the visible, external geometry of a well-formed crystal.