Elements, Compounds, and Mixtures #1

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined. Each substance retains its own properties.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together, resulting in a new substance with different properties.

Front

What is an element?

Back

An element is a pure substance that consists of only one type of atom and cannot be broken down into simpler substances.

Front

Give an example of a mixture.

Back

An example of a mixture is air, which contains various gases like nitrogen, oxygen, and carbon dioxide.

Front

Give an example of a compound.

Back

An example of a compound is water (H2O), which is made up of hydrogen and oxygen atoms chemically bonded together.

Front

Give an example of an element.

Back

An example of an element is chlorine gas (Cl2), which consists of only chlorine atoms.

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed composition and specific properties, while a mixture can vary in composition and retains the properties of its individual components.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout (e.g., saltwater), while a heterogeneous mixture has visibly different substances or phases (e.g., salad).

Front

What is the law of definite proportions?

Back

The law of definite proportions states that a chemical compound always contains its component elements in fixed ratio by mass.