Question

Identify the FALSE statement:

A. Crystals can be a variety of geometric shapes, including cubes, trapezoid, pyramids, octahedrons, hexagons, columns, blades and needles

B. There's an angle of 120 degrees between each crystal face of the hexagonal column of a quartz crystal

C. The faces of a crystal need to be the same size throughout the crystal, but the angle of intersection between comparable faces is the same throughout

D. Polymorphs of the same mineral have the same crystal shape because they contain the same basic atoms bonded in the same way

Answer 1

Polymorphs of the same mineral can have different crystal shapes due to their different crystal structures.

Step-by-step explanation:

The false statement is D. Polymorphs of the same mineral have the same crystal shape because they contain the same basic atoms bonded in the same way.

Polymorphs are different forms of the same mineral that have the same chemical composition but different crystal structures. Due to their different crystal structures, polymorphs can have different crystal shapes. For example, the mineral carbon can exist as both graphite and diamond, which have different crystal shapes.

Polymorphs are minerals with the same chemical composition but different structural arrangements and, as a result, different crystal shapes. Even though they contain the same basic atoms, the differences in bonding and structure give rise to diverse crystal forms. The other statements correctly describe the characteristics of crystals and quartz.