Elements, Compounds, and Mixtures

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What distinguishes an element from a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What is an example of a compound?

Back

Water (H2O) is an example of a compound, consisting of hydrogen and oxygen.

Front

What is an example of a mixture?

Back

Salad is an example of a mixture, as it contains various ingredients that are not chemically combined.

Front

How can you identify a compound in a chemical reaction?

Back

A compound can be identified in a chemical reaction by its chemical formula and the fact that it is formed from the combination of elements.

Front

What happens to water when electricity passes through it?

Back

When electricity passes through water, it breaks down into hydrogen and oxygen, which are elements.

Front

What is the difference between homogeneous and heterogeneous mixtures?

Back

Homogeneous mixtures have a uniform composition throughout, while heterogeneous mixtures have distinct, separate components.

Front

What is the role of elements in compounds?

Back

Elements are the building blocks of compounds; they combine in fixed ratios to form new substances.

Front

Can mixtures be separated? If so, how?

Back

Yes, mixtures can be separated by physical methods such as filtration, distillation, or evaporation.