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compound substance |
The Class of Substances that contain two or more elements (ElementalSubstances) in definite proportion by weight. The composition of a pure compound will be invariant, regardless of the method of preparation. Compounds are composed of more than one kind of atom (element). The term molecule is often used for the smallest unit of a compound that still retains all of the properties of the compound. Examples: Table salt (sodium chloride, NaCl), sugar (sucrose, C_{12}H_{22}O_{11}), and water (H_2O).
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freshwater | Freshwater is the subclass of Water that has low soluble mineral content. See also PotableWater. |
| | groundwater | Groundwater is the subclass of Water that is found in deposits in the earth. |
| | ice | Water that has the PhysicalState of Solid. |
| | rain | Rain refers to the Water resulting from Raining. |
| | steam | Steam refers to the Gas form of Water that is a result of Boiling it and diffusing it into the air |