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| Rainwater polluted with sulfuric acid, nitric acid, or both |
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| Percentage of Hydrogen. A scale that ranges from 0-14 that is used to measure whether a solution is acidic, basic, or neutral |
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| A solution that is less than 7 on the pH scale. Acid share the following characteristics: they taste sour, turn pH paper red, and react with baking soda to form carbon dioxide gas |
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| A solution that is greater than 7 on the pH scale. Bases share the following characteristics: they taste bitter, feel slippery, and turn pH paper blue |
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| A name given to the capacity of water to water to neutralize an acid. Measuring alkalinity is important in determining a stream's ability to neutralize acidic pollution from rainfall or wastewater |
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| A solution that is exactly 7 on the pH scale |
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| A mesurement of the amount of matter that makes up something |
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| an object or substance that has mass and takes up space |
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| One of a class of substances that cannot be seperated into simpler substances by chemical means |
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| A compound is a chemical that is formed when two or more atoms join together chemically |
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| two or more substances which have been combined such that each substance retains its own chemical identity. |
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| the smallest particle of an element with all the properties of the element that can combine with other atoms to form molecules. |
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| Periodic Table of the Elements |
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Definition
| a table illustrating the periodic system, in which the chemical elements are arranged according to their atomic numbers and are organized by groups (families) and periods. |
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| On the periodic table, family refers to a group of elements with similar chemical properties. They are in vertical columns on the periodic table. There are 18 groups or families. |
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| The horizontal rows on the Periodic Table are called Periods. |
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| A quality, attribute, or distinctive feature of anything- especially a characteristic attribute such as the density or strength of a material. |
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| any of a number of chemical elements, such as iron or copper, that are often lustrous solids, and are good conductors of heat and electricity. All metals except mercury are solid at room temperature. Metals are found on the left side of the Periodic Table. |
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| A conductor is a material which permits a flow of either electrical or heat energy. |
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| A property of metal that enables it to reflect light from the surface. ....how shiny a substance is. |
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| capable of being shaped. The term is often used with reference to metal, as in the degree to which they can be shaped by pounding with a hammer. |
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| A 'reactive' element readily engages in a chemical reaction. The most reactive elements are located on the leftmost side of the Periodic Table. |
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| One of the elements which do not exhibit metallic properties. Generally located to the right side of the Periodic Table. |
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| The family of elements, all gasses, in the column furthest to the right on the Periodic Table, consisting of nonreactive gasses. |
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| A 'non-reactive' element does not readily engage in a chemical reaction. The further to the right elements are on the Periodic Table, the less reactive they are. |
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| When a substance is hard and breaks apart. |
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| An element that has the properties of both metals and nonmetals. On the Periodic Table, they touch the zigzag line that divides the metals from the nonmetals |
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| The temperature at which a liquid substances changes from liquid to gas. |
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| The temperature at which a solid substance changes state to a liquid. |
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| A state of matter having definite shape and definite volume |
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| A state of matter having neither a defined volume nor defined shape. |
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| A state of matter having definite shape. A fluid. |
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| A change in the chemical identify of a substance. |
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| The change in a substance's physical properties, but not in its chemical identity. |
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| A group of interacting, interrelated, or interdependent elements forming a complex whole. |
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| A physical system that does not interact with other systems. Therefore, no matter or energy is lost within a closed system. |
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| A system that interacts with other systems, allowing the passage of matter and energy between systems. Most systems in the natural world are open system. |
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