| A | B |
|---|
| Allotrope | One of a number of molecular or different forms of an element. Different form of the same element |
| Atom | The basic unit of matter |
| Acid | A class of compounds that taste sour when dissolved in water, turn blue litmus paper red, and react with bases to form salts |
| Base | A class of compounds that tastes bitter, feel slippery in water solutions (think bleach), turn red litmus to blue, and react with acids to form salts |
| Chemical | Any substance with a definite composition (ammonia, water, carbon dioxide) |
| Chemical Reaction | The process by which elements or compounds interact with one another to form new substances (sugar/sulfuric acid demo) |
| Chemical change | A change that produces one or more new substances ( oxygen combining with hydrogen to make water) |
| Chemical Property | A property (characteristic) of matter that can only be observed when substances interact with one another during a chemical change |
| Compound | The result of two or more different elements are chemically combined |
| Density | A ratio of mass to volume |
| Endothermic reaction | A reaction (change) in which energy is absorbed |
| Exothermic Reaction | A reaction in which energy is released |
| Element | One of about 111 simpler substances from which more complex materials can be made |
| Heterogenous mixture | A mixture containing substances that are not uniformly distributed |
| Homogeneous mixture | A mixture containing substances that are uniformly distributed |
| inorganic compound | All compounds that do not belong to the organic family of compounds |
| Ion | An atom or group of atoms with an electrical charge |
| Mass | The quantity of matter in an object |
| Matter | Anything that has mass and volume |
| Mixture | A collection of two or more substances physically mixed. |
| Molecule | A neutral group of atoms held together by chemical bonds (sharing electrons) |
| Organic compound | Any molecular (covalently bonded compound) containing carbon, except carbonates and oxides (carbon dioxice, sodium carbonate) |
| Product | A chemical produced as a result of a chemical reaction |
| Physical change | A change that affects only physical properties, it does not alter the chemical make up of the material |
| Physical property | Any property of matter that can be measured without changine its chemical nature |
| pH | Used to determine wether a substance is an acid or a base |
| Quantity | Something that has magnitude or size |
| Reactant | A chemical that is present at the beginning of a chemical reaction and that takes part in the reaction |
| Unit | A standard used when measuring a quantity. In chemistry we use SI units |
| Volume | The amount of space occupied by an object (remember the cubic meter demo) |
| Weight | A forced produced by the action of gravity acting on a mass |
| Conversion factor | A mathematical expression that relates two units ( 12 in/i ft) |
