Chemical Reactions Vocabulary

What is a balanced equation?

• A chemical equation where mass is conserved with equal number of atoms of each element on both sides

• A chemical equation with more products than reactants

• A chemical equation with more reactants than products

• A chemical equation that only involves gases

What is a decomposition reaction?

• A reaction where two substances combine to form one

• A reaction that breaks down compounds into simpler products

• A reaction that involves an exchange of ions between two compounds

• A reaction where one element replaces another in a compound

Which statement best describes the law of conservation?

• Energy is created and destroyed in chemical changes

• Matter is created and destroyed in chemical changes

• Matter is not created nor destroyed in any chemical or physical change

• Energy is not conserved in physical changes

What is a single replacement reaction?

• A chemical change where compounds are broken down into simpler substances

• A chemical change where two elements are exchanged between compounds

• A chemical change where two substances combine to form one

• A chemical change where one element replaces a second element in a compound

What is a reactant in a chemical reaction?

• A substance produced in a chemical reaction

• A substance that slows down a chemical reaction

• A substance that speeds up a chemical reaction

• A substance that is present at the start of a chemical reaction

What is a synthesis reaction?

• A reaction where a single compound breaks down into two or more simpler substances

• A reaction where two or more simple substances combine to form a more complex compound

• A reaction where one element replaces another in a compound

• A reaction that involves the exchange of ions between two compounds

What is a double replacement reaction?

• A reaction where two substances combine to form one

• A reaction where compounds are broken down into simpler substances

• A reaction where one element replaces another in a compound

• A reaction where two elements are exchanged between compounds

What do we call the substance produced by a chemical reaction?

If the number of atoms for each element are not equal for the reactants and products, the equation is

What happens during a chemical reaction?

• atoms of one element are turned into the atoms of another element

• atoms of one or more substances are rearranged to create one or more new substances

• atoms of one element are destroyed and a new compound is created