Science powerpoint chemistry
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This document provides an overview of key chemistry concepts including: 1. Pure substances like elements and compounds that have uniform compositions. Elements contain only one type of atom while compounds contain molecules made of different elements. 2. Mixtures contain more than one substance mixed together without chemical bonds, and can be separated using techniques like filtration, distillation, evaporation based on particle size or boiling points. 3. Properties of matter like flammability and reactivity determine how substances will burn, combine, or change chemically with one another. Chemical changes can be identified by changes in color, production of gas, or formation of precipitates.
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This document defines key chemistry concepts including pure substances, elements, compounds, mixtures, solutions, suspensions, colloids, evaporation, distillation, filtration, physical properties, physical changes, chemical changes, flammability, and reactivity. Pure substances such as sugar and salt have the same composition. Elements like carbon cannot be broken down further, while compounds like water are made of two or more simpler substances. Mixtures vary in homogeneity from solutions to suspensions to colloids. Physical changes alter properties but not substances, while chemical changes form new substances.Classificationofmatter notes
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1. Matter is classified as either pure substances or mixtures. Pure substances are uniform and consist of elements or compounds, while mixtures contain two or more substances mixed together.
2. Elements are the simplest pure substances made of only one type of atom, while compounds are formed by chemical bonds between different atoms in specific ratios.
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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 anotherCh 3 matter properties and changes
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This document summarizes key concepts about matter and its properties from a chemistry textbook chapter. It defines matter, mass, and weight. It describes the different states of matter and properties of substances and mixtures. It explains physical and chemical changes and how to classify them. It also outlines the concepts of elements, compounds, mixtures, and the periodic table.Presentation (created from your Doc) (1).pptx
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this presentation is about properties of matterScience matter powerpoint
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This document discusses the differences between pure substances and mixtures. Pure substances are either elements or compounds, while mixtures contain two or more substances mixed together. Compounds are formed by a chemical change and can be broken down, while elements are simplest forms that cannot be broken down further. Mixtures can be either homogeneous, with substances evenly mixed together like solutions, or heterogeneous with distinct parts like suspensions. Common separation methods for mixtures include distillation, filtration, and evaporation which separate substances based on properties like boiling points or particle size. Chemical changes can be identified by a change in color, production of a gas, or formation of a precipitate.Elements Compounds and Mixtures (by Deven)
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An atom is the basic unit of an element, just as an element is the basic unit of a compound.
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An atom is to a compound molecule as a single unit is to multiple different units. A compound is made of two or more different elements chemically bonded together to form a new substance, with a compound molecule consisting of multiple different bonded atoms.
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3) A chemical change produces new substances with different compositions through rearrangement of atoms. Chemical properties and reactions allow identification of substances.
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- 2. Matter
- 3. Pure Substances Substances with a uniform composition and they cannot be broken down physically Examples: H2O, Cu
- 4. Element A pure substance that is only one type of atom Examples: Milk, H, He
- 5. Compound A pure substance made up of only one type of molecule Examples: H2O, H2O2
- 6. Mixtures A physical combination of more than one substance; not combined in a fixed ratio Homogenous- ex. salt water Heterogenous- ex. salsa
- 7. Filtration A process that separates materials based on the size of particles it/or solubility Example: sulfur and sodium chloride
- 8. Distilltion A process that separates the substances in a solution (mixture) based on their boiling points.
- 9. Evaporation A process used to isolate a solid dissolved in a liquid Example: NaCl and water
- 10. Flammability Ability of a substance to burn in the presence of oxygen. Example: Water and Alcohol
- 11. Reactivity How readily a substance will chemically combine with another substance. Example: Oxygen and potassium
- 12. 2.3 Overview Three common types of evidence for a chemical change: 1. A change in color 2. The production of gas 3. The formation of a precipitate
- 13. Review What is a physical property?
- 14. Review What is a chemical property?
- 15. Review How can you use physical properties to separate mixtures?
- 16. Review What are the four ways to recognize a chemical change?
- 17. Review What example of a chemical separation technique did we talk about? What is the difference between a solution, suspension, and colloid?