Term
| Law of Conservation states... |
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Definition
| The total mass remains constant during a chemical change. |
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Term
| An everyday example of a chemical change showing the law of conservation of mass is... |
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Definition
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Term
| A chemical reaction illustrating the law of conservation of mass is... |
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Definition
| Combustion: Specifically, Lavoisier's mercury + oxygen = mercury oxide experiment. |
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Term
| States of Matter: Solids are... |
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Definition
| The form of matter characterized by rigidity. A solid is relatively incompressible and has a fixed shape and volume. |
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Term
| States of Matter: Liquids are... |
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Definition
| The form of matter that is a relatively incompressible fluid. A liquid has a fixed volume but no fixed shape. |
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Term
| States of Matter: Gasses are... |
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Definition
| The form of matter that is an easily compressible fluid. A given quantity of gas will fit into a container of almost any size and shape. |
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Term
An example of a solid is...
(Water) |
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Definition
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Term
An example of a liquid is...
(Water) |
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Definition
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Term
An example of a gas is...
(Water) |
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Definition
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Term
| The three states of matter are... |
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Definition
| Solids, liquids, and gasses. |
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Term
| The two characteristics that define the states of matter are... |
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Definition
| Rigidity and compressibility. |
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Term
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Definition
| A change in the form of matter but not in its chemical identity. |
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Term
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Definition
| A change in which one or more kinds of matter are transformed into new matter or several new kinds of matter. |
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Term
| An example of a chemical change is... |
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Definition
| The rusting of iron. The iron and oxygen combine chemically and cannot be separated by any physical means. |
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Term
| An example of a physical change is... |
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Definition
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Term
| A physical property is... |
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Definition
| A characteristic that can be observed for a material without changing its chemical identity. |
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Term
| Three examples of physical properties are... |
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Definition
| The physical state, the melting point, and the color of the substance. |
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Term
| A chemical property is... |
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Definition
| A characteristic of a material involving its chemical change. |
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Term
| Three examples of chemical properties are... |
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Definition
| Iron's ability to react with oxygen and produce rust, a substance's toxicity, and the heat of combustion. |
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Term
| An example of a physical change is... |
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Definition
| Crumpling a piece of paper, melting an ice cube, boiling water. |
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Term
| An example of a chemical change is... |
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Definition
| Photosynthesis, rusting of iron, combustion of wood, cooking an egg, etc. |
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Term
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Definition
| A kind of matter that cannot be separated into other kinds of matter by any physical process. |
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Term
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Definition
| A pure substance or chemical substance is a material that has constant composition (is homogeneous) and has consistent properties throughout the sample. |
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Term
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Definition
| A substance that cannot be decomposed by any chemical reaction into simpler substances. |
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Term
| Three examples of elements are... |
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Definition
Hydrogen (H)
Oxygen (O)
Potassium (K) |
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Term
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Definition
| A substance composed of two or more elements chemically combined. |
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Term
| Three examples of compounds are... |
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Definition
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Term
| There are ___ elements known today. |
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Definition
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Term
| The law of definite proportions (law of constant composition) states... |
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Definition
| A pure compound, whatever its source, always contains definite or constant proportions of the elements by mass. |
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Term
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Definition
| A material that can be separated by physical means into two or more substances. |
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Term
| A heterogeneous mixture is... |
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Definition
| A mixture that consists of physically distinct parts, each with different properties. |
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Term
| A homogeneous mixture (solution) is... |
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Definition
| A mixture that is uniform in its properties throughout given samples. |
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Term
| An example of a heterogeneous mixture is... |
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Definition
| Salad, wood, choco. chip cookies. |
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Term
| An example of a homogeneous mixture is... |
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Definition
| Blood, salt water, vegetable oil. |
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Term
| An intensive property is... |
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Definition
| A property of matter that does not change as the amount of matter changes. |
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Term
| Two examples of intensive properties are... |
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Definition
| Density and boiling point. |
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Term
| An extensive property is... |
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Definition
| a property of matter that changes as the amount of matter changes. |
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Term
| Two examples of extensive properties are... |
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Definition
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Term
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Definition
| A technique for the separation of mixtures that relies on a mobile phase moving against a stationary phase. |
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Term
| Three types of chromatography are... |
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Definition
| Thin-layer, gas, and liquid. |
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Term
| Thin-layer chromatography is... |
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Definition
| when a sample is placed on a sheet (of glass with gel or paper)that's bottom is then placed into a liquid solvent in order to separate the components. (Lab) |
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Term
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Definition
| when a sample is turned into gas and pushed through a column by a non-reactive gas, separating the components. |
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Term
| Liquid chromatography is... |
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Definition
| when a stationary sample's components are separated by a mobile liquid. |
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