| A | B |
|---|
| Absolute Zero | Temperature at which all matter stops moving. |
| Accuracy | How close you are to the accepted answer. |
| Alkali Metals | Group 1A extremely reactive metals. |
| Alkaline Earth Metals | Group 2A harder and stronger metals that react to water |
| Alloys | A mixture of two or more elements with one being a metal. |
| Anion | An ion with a negative net charge. |
| Atom | Smallest particle of an element. |
| Atomic Mass Units | One twelfth the mass of a carbon atom. |
| Atomic Mass | Sum of the protons and neutrons in the nucleus. |
| Atomic Number | Equals the number of protons. |
| Cation | An ion with a positive net charge. |
| Chemical Bond | A force that holds two or more atoms together. |
| Chemical Change | When a substance reacts and produces two or more new substances. |
| Chemical Equation | A representation of a chemical reaction in which reactants and products are expressed in formulas. |
| Chemical Property | Any ability to produce a change in the composition of matter. |
| Coefficients | Whole numbers that are placed in front of reactants or products to help balance the equation. |
| Combustion Reaction | When a reactant reacts with oxygen rapidly, usually producing heat or light. |
| Compound | Matter composed of two or more substances that can be broken down through chemical means. |
| Condensation | Phase change when a substance goes from a gas to a liquid. |
| Covalent Bond | When two atoms share valance electrons. |
| Decomposition Reaction | A reaction where one reactant is broken down into two or more products. |
| Deposition | Phase change when a substance goes directly from a gas to a solid. |
| Directly Proportional | When the ratio of the two variables is constant or linear. |
| Double Replacement Reaction | A reaction where two elements change places making two new products. |
| Electron Cloud | The most likely position of an electron in an atom. |
| Electron Configuration | The arrangement of electrons in the orbitals of atoms. |
| Electron | A negative particle with little mass outside the nucleus. |
| Electroneativity | Tendency of an atom to attract electrons. |
| Elements | A substance that cannot be broken into smaller parts. |
| Endothermic Reaction | Energy is absorbed from the surrounding environment in the reaction. |
| Energy Levels | The possible energies that electrons in an atom can have. |
| Equilibrium | A state when a chemical reaction is in balance. |
| Exothermic Reaction | Energy is released to the surrounding environment from the reaction. |
| Gas | Has neither a definite shape nor volume. |
| Groups | Each column in the periodic table. |
| Halogens | Group 7A extremely reactive nonmetals |
| Heterogeneous Mixture | A mixture that is not distributed evenly through-out. |
| Homogenous Mixture | A mixture that is in the evenly distributed through-out. |
| Hypothesis | Educated testable statement. |
| Inversely Proportional | When the product of the two variables is constant quadratic. |
| Ion | An atom with a positive or negative net charge because of gaining or loosing of electrons. |
| Ionic Bond | A force that holds a cation and anion together. |
| Isotopes | Elements with the same number of protons but not neutrons |
| Liquid | Has a definite volume but not a definite shape. |
| Mendeleev | Father of the periodic table |
| Metallic Bond | The attraction between a metal cation and the shared electrons around it. |
| Metalloids | Elements with properties in between metals and nonmetals. |
| Metals | Good conductors of heat and electric current. |
| Mixture | Matter that can be separated through physical means. |
| Molar Mass | The mass of one mole of a substance. |
| Mole | A measurement used in chemical reactions. |
| Neutron | A neutral particle with measureable mass in the nucleus. |
| Noble Gases | Group 8A, non-reactive |
| Nonmetals | Poor conductors of heat and electric current. |
| Orbital | A region of space around the nucleus where the electron is likely to be found. |
| Period | Each row in the periodic table. |
| Periodic Law | Repeating pattern of properties on the periodic table. |
| Phase Change | The reversible physical change that occurs when a substance changes from one state of matter to another. |
| Physical Changes | A change in matter where the substance retains its original properties. |
| Physical Properties | Characteristics of matter that can be measured without changing the composition of the material. |
| Polyatomic Ion | A covalently bonded groups of atoms that have a positive or negative charge. |
| Precipitate | Solid that forms when two liquids are combined. |
| Precision | How exact a measurement is, limited by the tool. |
| Pressure | Force distributed over an area. |
| Products | The new substances created in chemical reactions. |
| Proton | A positive particle with measureable mass in the nucleus. |
| Reactants | The substance that undergoes change in chemical reactions. |
| Reaction Rate | The rate at which reactants change into products overtime. |
| Science | A system of knowledge and the methods used to find that knowledge. |
| Scientific Method | An organized method of conducting experiments. |
| Single Replacement Reactions | A reaction in which one element takes the place of another element in a compound. |
| Solid | Matter that has a definite volume and shape. |
| Solution | Mixtures of matter that are homogenous and in the same state. |
| Sublimation | Phase change when a substance goes directly from a solid to a gas. |
| Synthesis Reaction | A reaction where two or more substances are combined to make a single product. |
| Transition Metals | Metals in the middle of the periodic table. |
| Valance Electrons | Electrons in the highest orbital |
| Vaporization | The phase change when a substance goes from a liquid to a gas. |
