Chapter 1 PPt Student Handouts

Chapter 1 PPt Student Handouts - Chemistry I L321 CHAPTER 1...

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1 Chemistry I – L321 CHAPTER 1 (This is the easy stuff!) Chemistry = Properties and Changes of Matter Pure substances = properties are constant; only 1 type of substance Mixtures = properties are variable; 2 or more different substances Elements = cannot be broken into simpler substances; only 1 type of atom Compounds = can be broken into simpler substances; 2 or more types of atom Matter Homogeneous = composition is the same throughout the mixture Heterogeneous = composition varies Elements Element = a substance that cannot be broken down into simpler substances by chemical means.
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2 Compounds Compound = a pure substance with atoms of two or more elements chemically united in fixed proportions. Types of Matter Mixtures Matter Pure substances Heterogeneous mixtures Homogeneous mixtures Compounds Elements separated by physical methods separated by chemical methods http://www.shsu.edu/%7Echm_tgc/sounds/chrom.mov Gas Chromatography: An example of separating mixtures into compounds
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3 http://medplant.nmsu.edu/goals.html An Even Simpler Approach: Paper Chromatography Types of Properties and Changes Properties Chemical or physical Intensive or extensive Changes
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1. Smoke is an example of a(n): homogeneous mixture compound gaseous solution heterogeneous mixture element JOHN DALTON (1766-1844) “ALL MATTER IS COMPOSED OF SMALL PARTICLES CALLED ATOMS” Atomic Theory of Matter Postulates of Dalton’s Atomic Theory 1. All matter consists of tiny particles. The existence of atoms was first suggested more that 2000 years before Dalton's birth. Atoms remained pure speculation through most of this time, although Newton used arguments based on atoms to explain the gas laws in 1687. (Newton's speculations about atoms in the
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Chapter 1 PPt Student Handouts - Chemistry I L321 CHAPTER 1...

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