Physical Science Exam Review -- Chemistry Section

Front

What is the most chemically active nonmetal?

Back

Fluorine is the most chemically active nonmetal.

Front

Who discovered the electron?

Back

J.J. Thomson is credited with the discovery of the electron.

Front

What is the oxidation number of all the elements in group 15?

Back

The oxidation number of all the elements in group 15 is 3-.

Front

What are the products when an acid reacts with a base?

Back

The products are water and a salt.

Front

Which state of matter is characterized by a definite shape and volume?

Back

Solid is the state of matter characterized by a definite shape and volume.

Front

What is the definition of an acid?

Back

An acid is a substance that donates protons (H+) in a chemical reaction.

Front

What is the definition of a base?

Back

A base is a substance that accepts protons (H+) or donates hydroxide ions (OH-) in a chemical reaction.

Front

What is the pH scale used for?

Back

The pH scale is used to measure the acidity or basicity of a solution.

Front

What is the principle of conservation of mass?

Back

The principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.