Elements, Compounds, Mixtures

Front

What is a mixture?

Back

A mixture is formed when two or more substances are physically combined, and they can be separated by physical means.

Front

What is a pure substance?

Back

A pure substance is either an element or a compound, meaning it has a uniform and definite composition.

Front

Give an example of an element.

Back

Oxygen is an example of an element.

Front

What does the chemical formula NaHCO₃ represent?

Back

NaHCO₃ is the chemical formula for sodium bicarbonate, which is a compound.

Front

How can you identify a mixture in a diagram?

Back

In a diagram, a mixture is represented by different colored circles that are not chemically bonded together.

Front

What is an element?

Back

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

Front

What is a compound?

Back

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

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of substances, while a compound is a chemical combination of elements.

Front

Can a mixture be separated?

Back

Yes, mixtures can be separated by physical methods such as filtration, distillation, or evaporation.

Front

What is an example of a compound?

Back

Water (H₂O) is an example of a compound.