Unit 3 Review

Front

What are two physical properties that can be determined without measuring instruments?

Back

Texture and color.

Front

What is the smallest unit of matter?

Back

An atom.

Front

What do you call a substance formed when two or more atoms are combined together?

Back

A compound.

Front

What type of medicine should a person take to relieve heartburn?

Back

Basic medicine.

Front

How do you arrange pH values from weakest acid to strongest acid?

Back

6, 4, 3, 1.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed without changing its identity.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

Front

What is an example of a basic substance?

Back

Baking soda.

Front

What happens to the pH of a solution when an acid is added?

Back

The pH decreases, making the solution more acidic.