Question

Models of three chemical structures are shown below.



Which statement about the models is true?
A.
X represents an atom, Y represents an extended structure, and Z represents a molecule.
B.
X represents a molecule, Y represents an extended structure, and Z represents an atom.
C.
X represents a molecule, Y represents an atom, and Z represents an extended structure.
D.
X represents an atom, Y represents a molecule, and Z represents an extended structure.

Answer 1

To determine which statement is true regarding the three chemical structures (X, Y, and Z), we would need to analyze the characteristics of each model.

1. **Atom**: Typically represented by a single sphere or a small structure, often indicating an element.
2. **Molecule**: Represents a group of atoms bonded together (often depicted with several spheres connected).
3. **Extended Structure**: Often indicates a repeating unit or a large structure that extends in multiple directions, such as a crystal lattice or polymer.

Based on general conventions:
- If **Model X** looks like a simple sphere or atom, it would likely represent an atom.
- If **Model Y** appears to be interconnected and more complex (like a larger grouping or consistent pattern), it could represent an extended structure.
- If **Model Z** is a simpler structure but more complex than a single atom (but not extensive like Y), it would represent a molecule.

Without seeing the actual models, we cannot definitively conclude which statement is correct. However, based on typical descriptions:
- If we assume **X** is an atom, **Y** is a molecule, and **Z** is an extended structure, then one possible option could be **D**: "X represents an atom, Y represents a molecule, and Z represents an extended structure."

Please refer to the details of the models for accurate matching against these attributes to confirm or revise this interpretation.