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But some properties of water fall into the microscopic domain - what we can not observe with the naked eye . The description of water as comprised of two hydrogen atoms and one oxygen atom , and the explanation of freezing and boiling in terms of attractions between these molecules , is within the microscopic arena . The formula H2O , which can describe water at either the macroscopic or microscopic levels , is an example of the symbolic domain . The abbreviations -LRB- g -RRB- for gas , -LRB- s -RRB- for solid , and -LRB- l -RRB- for liquid are also symbolic . Chemistry deals with the composition , structure , and properties of matter , and the ways by which various forms of matter may be interconverted .
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