- The task involves identifying whether given substances are elements, compounds, or mixtures based on their chemical formulas and visual representations.
- For the first part, each substance is classified by its chemical formula: oxygen (O₂) is an element, sodium nitrate (NaNO₃) is a compound, salt water (NaCl + H₂O) is a mixture, magnesium oxide (MgO) is a compound, iron (Fe) is an element, and sodium carbonate (Na₂CO₃) is a compound.
- In the second part, diagrams use different shapes to represent atoms or molecules: a single shape type indicates an element, a combination of different shapes bonded together indicates a compound, and a random assortment of different shapes indicates a mixture.
- The answer key confirms these classifications for both the chemical formulas and the diagram-based representations.
Parent Tip: Review the logic above to help your child master the concept of compounds and molecules worksheet.
