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A compound contains atoms of different elements chemically combined together in a fixed ratio. A mixture is a combination of two or more substances where there is no chemical combination or reaction. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.
close. compound A pure substance made from two or more elements which are chemically bonded in a fixed ratio. and. mixtures. close. mixture When two or more compounds or elements are present ...
1. Definition. Compounds are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances. 2. Types. Compounds can be of three types, which are: covalent compounds, metallic compounds and ionic compounds.
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Jun 22, 2020 · A molecule is made whenever two or more atoms form chemical bonds, while a compound occurs whenever two or more different atoms form chemical bonds. Under this narrow definition, oxygen and hydrogen are molecules but not compounds. Water is both a molecule and a compound. Why Water Is not a Mixture. Another common question is whether water is a ...
Aug 23, 2019 · A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds. Mixtures can be classified as homogeneous or heterogeneous. Elements and compounds are both examples of pure substances.
Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different ...
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This means a lot of phases made of molecules (like H2O) are considered compounds (though H2 is not). While in mixtures proportions of constituents are highly variable, in compounds they are not. If a compound is molecular, all it's molecules are virtually identical (this doesn't account for different isotopes, or molecular conformations).