Chemical Formulas and Reactions Quiz

What is a chemical change?

• the formation of a new substance with different properties; cannot be undone by physical means

• a representation of a chemical reaction by symbols and numbers

• a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element

• a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)

What is a chemical equation?

• the formation of a new substance with different properties; cannot be undone by physical means

• a representation of a chemical reaction by symbols and numbers

• a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element

• a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)

What is a coefficient?

• a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)

• a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element

• the number placed in front of a chemical formula in a chemical equation; represents the number of molecules of that substance

• a representation of a chemical reaction by symbols and numbers

What is a chemical formula?

• the formation of a new substance with different properties; cannot be undone by physical means

• a representation of a chemical reaction by symbols and numbers

• a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)

• a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element

What is a chemical reaction?

• a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)

• a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element

• a representation of a chemical reaction by symbols and numbers

• the formation of a new substance with different properties; cannot be undone by physical means

What is a compound?

• combined atoms of the same element (e.g., O2)

• a substance made of two or more elements

• the formation of solids from a solution

• substance(s) resulting from a chemical reaction

What is the Law of conservation of mass?

• a substance made of two or more elements

• combined atoms of the same element (e.g., O2)

• matter is not created or destroyed; only rearranged

• the formation of solids from a solution

What is a molecule?

• combined atoms of the same element (e.g., O2)

• the formation of solids from a solution

• substance(s) resulting from a chemical reaction

• substances that are combined and changed during a chemical reaction

What is a precipitate?

• combined atoms of the same element (e.g., O2)

• the formation of solids from a solution

• substance(s) resulting from a chemical reaction

• substances that are combined and changed during a chemical reaction

What is a product?

• the formation of solids from a solution

• substances that are combined and changed during a chemical reaction

• substance(s) resulting from a chemical reaction

• the number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element present in a chemical formula