Elements, Compounds, Mixtures

Front

What is an element?

Back

An element is a substance that cannot be broken down into any other substance by ordinary chemical means.

Front

Define a compound.

Back

A compound is a substance made up of two or more chemically combined elements.

Tags

NGSS.MS-PS1-1

Front

What is a mixture?

Back

A mixture is formed when two or more substances are physically combined.

Front

What distinguishes a pure substance from 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 difference between an element and a compound?

Back

An element is a single type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Tags

NGSS.MS-PS1-1

Front

Can a mixture be separated by physical means?

Back

Yes, mixtures can be separated by physical means such as filtration, distillation, or centrifugation.

Front

What is a homogeneous mixture?

Back

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

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Tags

NGSS.MS-PS1-4

Front

Give an example of an element.

Back

An example of an element is oxygen (O).