Elements, Compounds, Mixtures

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by ordinary chemical means.

Tags

NGSS.MS-PS1-5

Front

Give an example of an element.

Back

Hydrogen (H) is an example of an element.

Front

What is a compound?

Back

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

Tags

NGSS.MS-PS1-1

Front

Give an example of a compound.

Back

Water (H₂O) is an example of a compound.

Tags

NGSS.MS-PS1-1

Front

What is a mixture?

Back

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

Front

Give an example of a mixture.

Back

Air is an example of a mixture, as it contains various gases.

Front

How are elements and compounds similar?

Back

Both elements and compounds are pure substances.

Front

What is the periodic table?

Back

The periodic table is a chart that organizes all known elements based on their atomic number and properties.

Front

What is a molecule?

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties.

Tags

NGSS.MS-PS1-1

Front

Can compounds be broken down by physical means?

Back

No, compounds cannot be broken down by physical means; they require chemical reactions.