chapter 1 Matter and Measurement

chapter 1 Matter and Measurement - CHEMISTRY The Central...

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Chapter 1 Introduction: Matter & Measurement CHEMISTRY The Central Science 10th Edition
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Chemistry is the study of the properties of materials and the changes that materials undergo. Chemistry is central to our understanding of other sciences. Chemistry is also encountered in everyday life. Why Study Chemistry
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Chemistry: Catastrophe Prevention? The space shuttle Columbia disintegrated in 2003 upon reentry into the Earth’s atmosphere due to a damaged thermal protection system.
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The Molecular Perspective of Chemistry Matter is the physical material of the universe. Matter is made up of relatively few elements. On the microscopic level, matter consists of atoms and molecules . Atoms combine to form molecules. As we see, molecules may consist of the same type of atoms or different types of atoms. The Study of Chemistry
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Molecular Perspective of Chemistry
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States of Matter Matter can be a gas , a liquid , or a solid . These are the three states of matter. Gases take the shape and volume of their container. Gases can be compressed to form liquids. Liquids take the shape of their container, but they do have their own volume. Solids are rigid and have a definite shape and volume. Classification of Matter
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Elements consist of a unique type of atom. Molecules can consist of more than one type of element. Molecules that have only one type of atom (an element). Molecules that have more than one type of atom (a compound). If more than one atom, element, or compound are found together, then the substance is a mixture. Pure Substances and Mixtures Classification of Matter
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Pure Substances and Mixtures
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Pure Substances and Mixtures If matter is not uniform throughout, then it is a heterogeneous mixture . If matter is uniform throughout, it is homogeneous . If homogeneous matter can be separated by physical means, then the matter is a mixture. If homogeneous matter cannot be separated by physical means, then the matter is a pure substance . If a pure substance can be decomposed into something else, then the substance is a compound . Classification of Matter
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Elements If a pure substance cannot be decomposed into something else, then the substance is an element . There are 114 elements known. Each element is given a unique chemical symbol (one or two letters). Elements are building blocks of matter. The earth’s crust consists of 5 main elements.
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