Pre-AP Chemistry Midterm Test Review

Front

What is the purpose of adjusting coefficients in a chemical equation?

Back

To balance the number of atoms of each element on both sides of the equation.

Front

What does a chemical formula represent?

Back

It includes the symbols of the elements in the compound and subscripts that indicate the number of atoms or ions of each element that are combined in the compound.

Front

Back

Dinitrogen trioxide.

Front

What do elements in the same group of the periodic table have in common?

Back

They have similar properties.

Front

When is a chemical equation considered balanced?

Back

When the same number of each kind of atom appears in the reactants and in the products.

Front

What are coefficients in a chemical equation?

Back

Numbers placed before the compounds to indicate the number of molecules or moles of that substance.

Front

What are subscripts in a chemical formula?

Back

Numbers written after an element's symbol to indicate the number of atoms of that element in a molecule.

Front

What is the difference between a reactant and a product in a chemical reaction?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.

Front

What is the significance of the periodic table in chemistry?

Back

It organizes elements based on their properties and atomic structure, allowing predictions about their behavior.

Front

How do you determine the molecular formula from the empirical formula?

Back

By multiplying the subscripts in the empirical formula by a whole number to match the molar mass of the compound.