Question

the repeating subunits that are responsible for the shape of a crystal are known as

amorphous cells
unit cells
heavy nuclei
light electrons

Explanation:

Analyze the question prompt

The question asks for the term used to describe the repeating subunits that are responsible for the overall shape of a crystal. This relates to our understanding of the States of Matter, specifically solid structures.

Define crystalline solid structures

Crystalline solids have highly ordered, repeating arrangements of particles. The smallest repeating structural unit of a crystalline solid that showcases the entire symmetry and pattern of the crystal lattice is called a unit cell.

Evaluate the given options

• amorphous cells: Amorphous solids lack a long-range ordered repeating structure, so this term is incorrect.
• unit cells: This is the correct scientific term for the repeating subunits that build up a crystal lattice.
• heavy nuclei: This refers to atomic nuclei with high mass numbers, which is an atomic structure concept, not a crystal subunit.
• light electrons: This refers to subatomic particles and does not describe repeating structural blocks of crystals.

Answer:

• amorphous cells
• unit cells (Correct answer)
• heavy nuclei
• light electrons