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This document defines and provides examples of key chemistry concepts including mixtures, elements, compounds, alloys, colloids, solutions, distillation, filtration, evaporation, flammability, reactivity, and chemical changes. It also asks questions to test understanding of these concepts.
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1. The document discusses different types of matter including pure substances, elements, compounds, and mixtures.
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Pure substances have a uniform, fixed composition and consistent properties. Elements contain only one type of atom, while compounds contain two or more elements joined in a fixed ratio. Mixtures have variable compositions and properties that depend on how evenly the parts are distributed. Distillation, filtration, evaporation, and other separation processes can be used to isolate or purify substances based on their physical properties.Chapter 2 science 8-2 
Chapter 2 science 8-2 amyggraland
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This document provides an overview of different types of matter and their properties. It discusses pure substances such as elements and compounds, as well as mixtures that can be either homogeneous or heterogeneous. Physical properties like density, melting point, and viscosity are covered. Separation techniques including distillation, filtration, and evaporation are also explained. The document concludes with a discussion of chemical properties like reactivity and evidence of chemical changes through color change, gas production, or temperature change.Using Properties of Matter in Identifying Substances
Using Properties of Matter in Identifying SubstancesMaryAnnLazarteBesar
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The properties of matter are crucial in identifying substances because they provide distinguishing characteristics that allow us to differentiate one substance from another
Chapter 2 matter and change
Chapter 2 matter and changemcnewbold
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This chapter discusses the fundamental concepts of matter and chemical changes. It defines matter as anything that has mass and takes up space, and describes its three main states as solid, liquid, and gas. Properties of matter are classified as either intensive or extensive. Physical and chemical properties are distinguished. Mixtures and compounds are introduced, where mixtures maintain the properties of the individual components and compounds exhibit new properties. Elements are defined as pure substances made of only one type of atom that cannot be broken down further by chemical means. Chemical changes, in which the reactants are converted into products with different compositions, are described along with clues that indicate a chemical change has occurred. The law of conservation of mass, whereby the mass of the reactants equals the massChem unit 2 presentation
Chem unit 2 presentationbobcatchemistry
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This document provides an overview of chemistry unit 2 which covers how matter changes. It discusses the three common states of matter, physical and chemical properties, and how matter undergoes physical and chemical changes. It also addresses mixtures as combinations of substances and how mixtures can be separated. The document defines elements and compounds, and explains the organization of elements in the periodic table. It describes how all compounds obey the laws of definite and multiple proportions.Chem unit 2 presentation
Chem unit 2 presentationbobcatchemistry
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This document provides an overview of chemistry unit 2 which covers how matter changes. It discusses the three common states of matter - solids, liquids and gases. It defines physical and chemical properties and changes. It also defines mixtures and how they are combinations of substances that can be separated. It introduces elements and compounds, explaining how compounds are combinations of elements that have different properties. It covers the laws of definite and multiple proportions for compounds.Science
- 2. Mixtures Mixtures consist of two or more substances that can be physically separated and are not chemically combined. The characteristic properties of the substances do not change. Heterogeneous mixture Homogeneous mixture
- 3. Elements Elements cannot be physically or chemically broken apart into anything else. They are the simplest form of a pure substance.
- 4. Compounds Compounds are composed of two or more pure substance that are chemically combined. Compounds do not retain to their characteristic properties and can be separated chemically.
- 5. Alloys An alloy is a mixture of two or more metals.
- 6. Colloid A colloid has particles that are mixed together, but not dissolved.
- 7. Solution A solution is a homogeneous mixture that is fully mixed. It has a solute and a solvent.
- 8. Distillation A process that separates the substances in a solution based on their boiling points.
- 9. Filtration A process that separates materials based on the size of their particles and/or solubility.
- 10. Evaporation A process used to isolate a solid dissolved in a liquid.
- 11. Flammability Flammability is a materials ability to burn in the presence of oxygen.
- 12. Reactivity Reactivity is the property that describes how fast a substance combines chemically with another.
- 13. Chemical changes Change in color, production of gas, formation of a precipitate.
- 14. Give an example of a colloid
- 15. How would you separate sugar dissolved in water and collect a sample of each?
- 16. Is this a chemical or physical change?
- 17. Give an example of a heterogeneous mixture
- 18. Explain how you would calculate the density, volume, and mass of each substance within a mixture of alcohol and water