Elements, Compounds and Mixtures

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together, resulting in a new substance with different properties.

Front

Is water (H2O) found on the periodic table?

Back

No, water is a compound, not an element, and therefore is not listed on the periodic table.

Front

What happens when copper (Cu) and oxygen (O) combine?

Back

They form a compound, specifically copper oxide.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means.

Front

Give an example of a mixture.

Back

Sugar crystals dissolving in water is an example of a mixture.

Front

What must happen for elements to form a compound?

Back

Chemical bonds must form between the atoms of the elements.

Front

Why is saltwater considered a mixture?

Back

Saltwater is a mixture because it is composed of two or more substances (salt and water) that retain their own chemical properties.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed from two or more elements that are chemically bonded, while a mixture is a combination of substances that are not chemically bonded.

Front

What is an example of a compound?

Back

Table salt (NaCl) is an example of a compound formed from sodium and chlorine.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.