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Diamond is a pure substance because it is directly made up of carbon atoms. Salt water is not because it contains sodium chloride and water. A pure substance has a definite and constant composition — like salt or sugar. A pure substance can be either an element or a compound, but the composition of a pure substance doesn’t vary. An element is composed of a single kind of atom. An atom is the smallest particle of an element that still has all the properties of the element.
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2. A pure substance has constant physical and chemical properties, while mixtures have varying physical and chemical properties (i.e., boiling point and melting point). Pure substances are further divided into elements and compounds. The combination of two or more pure substances is called a mixture. Mixtures can be classified into two types viz.
substances (elements and compounds) and.
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Pure substances. Any material that is not a mixture, is called a pure substance.Pure substances include elements and compounds.It is much more difficult to break down pure substances into their parts, and complex chemical methods are needed to do this. 2.3 Pure substances (ESAZ). Any material that is not a mixture, is called a pure substance.Pure substances include elements and compounds.It is much more difficult to break down pure substances into their parts, and complex chemical methods are needed to do this.
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Definite composition means that the makeup of the chemical is fixed and constant throughout the pure substance. Another way of saying it is that a pure substance has the same type of chemical and this chemical has the same composition throughout the substance. Simply, a pure substance is a substance which is composed by molecules or directly by atoms of only one kind. Diamond is a pure substance because it is directly made up of carbon atoms. Salt water is not because it contains sodium chloride and water.
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Element.
ex. gold is correct for whats is a pure substance list examples
Suppose you have a pure substance at three different sets of conditions of temperature and pressure corresponding to 1, 2 and 3 in the next diagram. Under the set of conditions at 1 in the diagram, the substance would be a solid because it falls into that area of the phase diagram.
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Pure substances cannot be broken down by physical means. Pure substances contain only one kind of molecule. Molecules are small groups of atoms that make Solution: An element is a pure substance made up of identical atoms. An atom is the smallest unit of a pure substance or element that can exist and still loosing all its original properties; such pure substances are called elements. It's a pure substance because it is a compound and is composed of elements which are also pure substances. Four cheese - Mixture.