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Ch 3 Chemistry
Module 2 Vocabulary
Term | Definition |
---|---|
The Law of Mass Conservation | Matter cannot be created or destroyed, it can only change forms. |
Element | Any substance that cannot be broken down (decomposed) into simpler components. |
Compounds | Substances that can be decomposed into elements by chemical means. |
The Law of Definite Proportions | The proportion of elements in any compound is always the same. |
The Law of Multiple Proportions | If 2 elements combine to form different compounds, the ratio of masses of the second element that react with a fixed mass of the first element will be a simple, whole-number ratio. |
Pure substance | A substance that contains only one element or compound. |
Mixture | A substance that contains different compounds and/or elements. |
Homogeneous mixture | A mixture with a composition that is always the same no matter what part of the sample is observed. |
Heterogeneous mixture | A mixture with a composition that is different depending on what part of the sample is observed. |