what is the difference between a pure substance and an element?
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A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds. Elements: are pure substances made up of only l type of atom. ... Elements cannot be broken down into anything simpler physically or chemically.
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If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture.
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A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.
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Atoms and Ions have the same number of neutrons. A molecule is particle consisting of multiple atoms. Pure elements are substances composed of one type of atom where as a compound is made up of different types of atoms. Ionic compounds consist of metals and nonmetals and contain ions with charges.
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An atom is a particle of matter that characterizes a chemical element. It is the smallest part of ordinary matter. ... A compound is a substance that is made up of two or more different elements that are chemically joined, such as H2O,CO,NaCl . Note: All compounds are molecules, but not all molecules are compounds.
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*Pure substances have a fixed chemical composition. ... Pure substance contain only one type of particles, for example water. while homogeneous mixture contains 2 or more type of particle but all these particles will be in same phase and we cannot separate them physically. For example, a mixture of water and milk.
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A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.
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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.
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A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements that compose the compound are chemically combined. Elements contain only one type of atom.
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Element: ... A compound is a pure substance made up of two or more elements chemically combined in a fixed proportion by mass. Mixture: An impure substance or mixture is a substance that contains two or more pure substances physically mixtures in any proportion.
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A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.
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Iodized table salt is a mixture, not a pure substance. NaCl with no iodine is a pure substance. A chemical substance is a form of matter that has constant chemical composition and characteristic properties. [1] It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds.
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Substances are made of elements. Compounds, or "compound substances", are made of different elements (types of atoms). Elementary substances are made of a single element (one type of atoms). ... Ont the other hand, a compound, is a certain kind of substance, constituted by a regular combination of different elements.
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Pure substances are composed of a single element or compound while homogeneous mixtures are composed of multiple different elements or compounds.
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Answer: 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.
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Elements are substances composed of one type of atom. ... Compounds are substances composed of two or more different elements. Compounds are also pure substances. A mixture is a physical combination of elements or compounds where the parts of the mixture are not chemically bonded and so retain their own identity.
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A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds.