substances definition
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Pure Substance Definition Pure Substance Definition. A pure substance is a sample of matter with both definite and constant composition with distinct chemical properties. Alternate Spellings: chemical substance. Examples of Pure Substances. Examples of pure substances include elements and compounds. Alloys and other solutions may also be considered pure. water.
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- In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components without breaking chemical bonds. Chemical substances can be solids, liquids, gases, or plasma.
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What is a Substance? - Definition, Types & Examples A substance is simply a pure form of matter. In other words, a substance is matter than contains only one type of atom or molecule. Pure substances can be further divided into two sub categories: elements and compounds. Elements are the simplest form of matter, which means they cannot be broken down into smaller components physically or chemically.
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matter syn: matter, material, stuff, substance refer to that of which physical objects are composed. matter applies to anything occupying space and perceptible to the senses; it may denote a particular kind: solid matter; vegetable matter.
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Chemical substance Chemical substances may be combined or converted to others by means of chemical reactions. Forms of energy, such as light and heat, are not matter, and are thus not substances in this regard.
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- Mixture. A mixture is one in which two or more pure substances retain their chemical identity. For example, if you dissolve some sugar into water, the sugar molecules and water molecules remain as sugar and water, it is just that the two are now dispersed in each other.
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What is a Substance? - Definition, Types & Examples Chemistry is the study of matter, which can be classified into two categories: substances and mixtures. In this lesson, we will define the term 'substance' and discuss types of substances and specific examples in more detail. College Earth Science: Help and Review / Science Courses.
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Chapter 2 Study Materials Define the following terms: element, compound, atom, molecules. Element - pure substance; made up of only one kind of atom. Compound - substances whose molecules have more than one kind of atom. Atoms - basic units of matter. Molecules - a group of atoms bound together in a group.
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What Are Examples of Pure Substances? A pure substance or chemical substance is a material that has constant composition (is homogeneous) and has consistent properties throughout the sample. Here are examples of pure substances. Answer: Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Tin, sulfur and diamond are examples of pure substances which are chemical elements. All elements are pure substances.
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Chemical substance While the term chemical substance is a precise technical term that is synonymous with chemical for chemists, the word chemical is used in general usage in the English speaking world to refer to both (pure) chemical substances and mixtures (often called compounds), and especially when produced or purified in a laboratory or an industrial process.
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What is a Substance? - Definition, Types & Examples In other words, a substance is matter than contains only one type of atom or molecule. Pure substances can be further divided into two sub categories: elements and compounds. Elements are the simplest form of matter, which means they cannot be broken down into smaller components physically or chemically.
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- P URE SUBSTANCES ! A pure substance (usually referred to simply as a substance) is matter that has distinct properties and a composition that doesn't vary from sample to sample. ! A pure substance can be an element, compound, or a mixture. ELEMENTS ! All substances are either elements or compounds.
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What is a Substance? - Definition, Types & Examples While compounds are also pure substances, they differ from elements because compounds can be broken down into simpler components (the elements that make up the compound). Some examples of compounds are carbon dioxide (COsub2), rust (Fesub2O3), and table salt (NaCl).
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- Top Definition. Chemical. 1. Chemicals are pure substances that make up the universe. They can be benign (harmless) such as trihydrogenoxide or malevolent (harmful) such as dihydrogenoxide. 2. Pertaining to chemistry, the study of chemicals. Your food is full of chemicals that might kill you.
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Chemical substance A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys.ccording to this definition a chemical substance can either be a pure chemical element or a pure chemical compound. But, there are exceptions to this definition; a pure substance can also be defined as a form of matter that has both definite composition and distinct properties.
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- Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys.
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- A compound is a substance formed when two or more elements are chemically joined. Water, salt, and sugar are examples of compounds. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.
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Chemical substance A chemical substance, also known as a pure substance, is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys. Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar .
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Mixture In chemistry, a mixture is a material made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.
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- matter. 1  the substance or substances of which any physical object consists or is composed: the matter of which the earth is made. 2  physical or corporeal substance in general, whether solid, liquid, or gaseous, especially as distinguished from incorporeal substance, as spirit or mind, or from qualities, actions, and the like.
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- Pure substances are defined as substances that are made of only one type of atom or molecule. The purity of a substance is the measure of the extent to which a given substance is pure. The physical properties of a pure substance include well-defined melting and boiling points. The purity of a substance also impacts the chemical properties of a substance by reducing the chances of unexpected products being formed if impurities are present within the substance.
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chemicalnoun  [ C] B2 any basic substance that is used in or produced by a reaction involving changes to atoms or molecules: 1  The government has pledged to reduce the amount of chemicals used in food production. 2  Each year, factories release millions of tons of toxic (= poisonous) chemicals into the atmosphere.
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Chemical substance A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys. chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice. Compounds based primarily on carbon and hydrogen atoms are called organic compounds, and all others are called inorganic compounds.