Worksheet on classifying matter using particle models with labeled diagrams and questions.

1. Check the boxes to indicate whether each model shows atoms, molecules, elements, and/or compounds.

| Model | Atom | Molecule | Element | Compound |
|-------|------|----------|---------|----------|
| A | ✓ | | ✓ | |
| B | | ✓ | ✓ | |
| C | | ✓ | | ✓ |
| D | | ✓ | | ✓ |
| E | | ✓ | ✓ | |
| F | | ✓ | | ✓ |

2. Models B, C, D, E, and F have molecules. In these models, multiple atoms are bonded together to form distinct units (molecules). Model A contains only individual atoms, not bonded into molecules.

3. Yes, an element can be made of molecules. Model B and Model E show this. In both cases, all the atoms in the model are of the same type (indicating an element), but they are bonded together in pairs or groups to form molecules. For example, Model B shows diatomic molecules of a single element, and Model E shows larger molecular structures composed of identical atoms.