Which of the following refers to a combination of two or more substances that are not chemically bonded?

A combination of two or more substances that are not chemically bonded is referred to as a mixture. In a mixture, the different substances retain their individual properties and can be separated by physical means, such as filtration or distillation. This characteristic distinguishes mixtures from compounds, where the components are chemically bonded and lose their original properties.

For example, if you mix sand and salt, you create a mixture where both sand and salt can still be identified and separated. Similarly, in a garden salad containing lettuce, tomatoes, and cucumbers, each ingredient retains its distinct flavor and texture.

On the other hand, elements are pure substances that cannot be divided into simpler substances by chemical means, while compounds consist of two or more elements that are chemically combined in a fixed ratio. Alloys, which are also mentioned, specifically refer to solid mixtures of metals or a mixture of metal with other elements, which do not apply to the general definition of a mixture. Thus, the term that best fits the description of substances that are not chemically bonded is indeed a mixture.