CHEMISTRY EXAM REVIEW PART 1

Front

What is an independent variable?

Back

An independent variable is a factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is a dependent variable?

Back

A dependent variable is the factor that is measured or tested in an experiment, which is affected by changes in the independent variable.

Front

What does the ion S^-2 represent?

Back

The ion S^-2 indicates that sulfur has gained 2 electrons.

Front

What can move from one energy level to another when they gain or lose energy?

Back

Electrons can move from one energy level to another when they gain or lose energy.

Front

What are anions?

Back

Anions are negatively charged ions that form when nonmetals gain electrons.

Front

What is a control variable?

Back

A control variable is a factor that is kept constant throughout an experiment to ensure that the results are valid.

Front

What is the role of electrons in chemical reactions?

Back

Electrons are involved in forming bonds between atoms and can be gained or lost during chemical reactions.

Front

What is the difference between metals and nonmetals in terms of electron behavior?

Back

Metals tend to lose electrons and form positive ions, while nonmetals tend to gain electrons and form negative ions.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their atomic number and properties, helping to predict chemical behavior.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a compound, formed by the sharing or transfer of electrons.