Compounds, Mixtures, Elements

Front

What is an element?

Back

An element is a pure substance that consists of only one kind of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different atoms bond together.

Tags

NGSS.MS-PS1-1

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances.

Front

Give examples of elements.

Back

Examples of elements include diamonds (C) and uranium (U).

Front

What is a pure substance?

Back

A pure substance is either an element or a compound.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

Are compounds considered pure substances?

Back

Yes, compounds are considered pure substances because they have a fixed composition.

Tags

NGSS.MS-PS1-4

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed ratio of elements, while a mixture can vary in composition.

Front

What is the smallest unit of an element?

Back

The smallest unit of an element is an atom.

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a compound using symbols for its constituent elements.

Tags

NGSS.MS-PS1-1