Pure Substances and Mixtures Quick Check #1

Front

Classify the oxygen in the air we breathe, which is made of one type of atom: oxygen atoms.

Back

Element, pure substance

Front

This diagram represents a _____. Options: pure substance that is a compound, mixture of elements, pure substance that is an element, mixture of compounds

Back

mixture of elements

Front

What type of substance is pictured?

Back

compound

Front

Which is a pure substance?

Back

Front

The difference between a molecule and a compound is that

Back

a compound is made of two or more different types of atoms.

Front

Identify the substance in box D: element, compound, mixture.

Back

mixture

Front

A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile. Which of these statements best describes the contents of the pile?

Back

It is a heterogeneous mixture of iron and sulfur that can be separated by magnetism.

Front

Ammonia is a colorless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia is a . . . .

Back

compound

Front

When matter is composed of two or more component substances which retain their own identifying properties, what is it classified as?

Back

A mixture

Front

Identify which of the four models best represents a pure compound: Model 1, Model 2, Model 3, Model 4.

Back

Model 3