Elements, Compounds, Mixtures

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined, such as brass, which is made of zinc and copper.

Front

What is a pure substance?

Back

A pure substance is a material that is made up of only one type of particle, which can be either an element or a compound.

Front

Define a compound.

Back

A compound is a substance formed when two or more elements are chemically bonded together, such as water (H2O).

Tags

NGSS.MS-PS1-1

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means, such as oxygen (O) or gold (Au).

Front

What is the chemical symbol for Potassium?

Back

K

Front

What distinguishes a compound from a mixture?

Back

A compound consists of chemically bonded elements, while a mixture consists of physically combined substances that retain their individual properties.

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

What is the chemical formula for table salt?

Back

NaCl (sodium chloride), which is a compound formed from sodium and chlorine.

Tags

NGSS.MS-PS1-1

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent), like sugar in water.

Front

What is the difference between a homogeneous and heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout (like saltwater), while a heterogeneous mixture has a non-uniform composition (like a salad).