Elements, Compounds, and Mixtures

Front

What is 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 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 chemical symbol for Iron?

Back

Fe

Front

How many elements are in the compound Na2CO3?

Back

3 (Sodium, Carbon, and Oxygen)

Front

What are subscripts in a chemical formula?

Back

Subscripts are numbers written below and to the right of a chemical symbol that indicate the number of atoms of that element in a molecule.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

What is the chemical symbol for Sodium?

Back

Na

Front

What is the chemical formula for water?

Back

H2O

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.