Question | Answer |
Law of Conservation of Mass | States that in a chemical reaction, the mass of the products equals the mass of the reactants. |
Physical Change | Changes in a substance that affect only physical properties. |
Chemical Change | Chemical changes produce new substances that have properties different from those of the original substances. |
Element | Substance that cannot be broken down into simpler substances. |
Chemical Formula | An expression which states the number and type of atoms present in a molecule of a substance. |
Element Molecule | Molecules of only one atom. |
Compound Molecule | Molecules of more than one type of atom. |
Chemical Equation | Shorthand form for writing what reactants are used and what products are formed in a chemical reaction. |
Chemical Reaction | Process that produces chemical change, resulting in new substances that have properties different from those of the original substances. |
Reactants (in a chemical equation) | Substance that exists before a chemical reaction begins. |
Products (in a chemical equation) | Substance that forms as a result of a chemical reaction. |
Coefficient | The coefficient tells the number of molecules. |
Subscript | The subscripts tells the number of a certain type of atom in one molecule. |
Diatomic Molecule | Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements. |