EI3 Flashcard

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; it can only be transformed from one form to another.

Front

What happens to the mass of reactants and products in a chemical reaction?

Back

The mass of the reactants before the reaction is equal to the mass of the products after the reaction.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, reflecting the conservation of mass.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change to form products.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

How can you identify the number of atoms in a chemical formula?

Back

In a chemical formula, the subscript numbers indicate the number of atoms of each element present in the molecule.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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 a chemical formula?

Back

A chemical formula is a way of expressing the composition of a substance using symbols for the elements and numbers to indicate the ratio of atoms.