Elements, Compounds, and Mixtures

Front

What is the definition of an element?

Back

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

Front

What is a compound?

Back

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

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

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition with distinct phases or layers.

Front

Give an example of a homogeneous mixture.

Back

Steel is an example of a homogeneous mixture.

Front

Give an example of a heterogeneous mixture.

Back

Soil is an example of a heterogeneous mixture.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.

Front

What is the chemical formula for ammonia?

Back

The chemical formula for ammonia is NH₃.

Front

What is the significance of the chemical formula in a compound?

Back

The chemical formula indicates the types and numbers of atoms present in a compound, providing information about its composition.

Front

What is the term for a mixture where the components are evenly distributed?

Back

A homogeneous mixture.