Questions: Review the item in each row in the table below and identify whether it is an element, compound, or mixture. If it is a mixture, then also specify whether heterogeneous or homogeneous.

Solution Steps

To answer the question, we need to review each item in the table and classify it as an element, compound, or mixture. If it is a mixture, we will further specify whether it is heterogeneous or homogeneous. Since the table is not provided, I will explain the general approach to classifying substances.

Elements are pure substances that consist of only one type of atom. They cannot be broken down into simpler substances by chemical means. Examples include oxygen (O), gold (Au), and hydrogen (H).

Compounds are pure substances composed of two or more different elements that are chemically combined in fixed proportions. They can be broken down into simpler substances by chemical means. Examples include water (H₂O), carbon dioxide (CO₂), and sodium chloride (NaCl).

Mixtures are combinations of two or more substances that are not chemically combined. They can be separated by physical means. Mixtures can be classified into two types:

• Homogeneous Mixtures: These mixtures have a uniform composition throughout. The different components are not visibly distinguishable. Examples include saltwater and air.
• Heterogeneous Mixtures: These mixtures have a non-uniform composition. The different components are visibly distinguishable. Examples include salad and sand in water.

Final Answer