3. Matter and Energy

In the classification of matter, what term describes a pure substance made of only one kind of atom?

How does an element differ from a compound?

Which statement best describes how an element and a compound differ?

Which component of air is an element (rather than a compound or mixture)?

In the classification of matter, which statement correctly describes water?

Baking soda, also known as sodium bicarbonate (${\mathrm{Na}}_1{H}_1{\mathrm{CO}}_3$), is best classified as which type of matter?

In the classification of matter, how should a dog be categorized?