Question | Answer |
Law of Conservation of Mass | Law stating that in a chemical reaction, matter is neither gained nor lost. |
Physical Change | A type of change in which the form of matter is altered, but one substance is not transformed into another. |
Chemical Change | A process in which one or more substances are changed into one or more different substances. |
Element | Substance that cannot be broken down into simpler substances. |
Chemical Formula | A combination of symbols used to express the chemical composition of a substance. |
Element Molecule | A group of atoms bonded together to make an element. |
Compound Molecule | Where two or more elements are put together. |
Chemical Equation | A 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 original substance. |
Reactants (in a chemical equation) | Substance that exists before a chemical reaction occurs. |
Products (in a chemical equation) | Substance that forms as a result of a chemical reaction. |
Coefficient (in a chemical equation) | The number before the variable. |
Subscript (in a chemical equation) | Subscripts are used in writing formulas. The subscript indicates the number of the preceding element. |
Diatomic Molecule | A molecule which will have two of the same element. It cannot have less than or more than two of the same element. |