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Unformatted text preview: pressure is shown in boldface. element allotrope oxygen O, nascent oxygen O 2 , oxygen gas O 3 , ozone carbon graphite diamond • gaseous elements commonly occur as diatomic molecules (except for the noble gases) Mixtures • characteristics o percentage composition varies from sample to sample o components are chemically different and retain properties in a mixture o do not melt/boil at a definite temperature • two types o heterogeneous mixtures components not uniformly mixed more than one phase o homogeneous mixtures components uniformly mixed one phase also called solutions...
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