Ch_1_All - Chemistry-A Molecular Science Chapter 1 Early...

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Unformatted text preview: Chemistry-A Molecular Science Chapter 1 Early Experiments What is Science? Science : the branch of knowledge explored by means of the scientific method. What is Chemistry? Chemistry is the science of matter, its properties and the changes it undergoes ENERGY octane coal fuel cell powered car Polyethylene strand (60 million tons produced worldwide annually) Synthetic materials Food packaging Tubing Films Fibers (rayon, spandex) electronics spandex Aspirin (acetylsalicylic acid)-first synthetic drug (1897) Synthetic drugs Taxol-anticancer drug isolated from the Pacific Yew tree by Drs. Wall and Wani at RTI-synthetic pathway discovered by Dr.Holton at FSU Chemical processes must be understood at the molecular level Atoms and molecules are invisible How has the science reached the point where we can understand these invisible processes? How do we know the nature of these invisible atoms and molecules? Scientific Method OBSERVATION HYPOTHESIS PREDICTION EXPERIMENT THEORY LAW Law- summarizes observations (facts ) Law of Gravity Law of Conservation of Mass Mass is neither created or destroyed Scientific laws describe observations, they dont explain them. Scientific Theories Theory- Well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses. THEORIES are valid only as long as they are supported by experiment. Theory of Evolution Theory of Relativity Quantum Theory Atomic Theory Daltons Atomic Theory (1804) the smallest unit of an element is an atom\ two or more chemically bound atoms form molecules atoms are not changed in chemical reactions, they simply re-arrange. CO 2 C + O 2 * Note that conservation of matter is supported! Both C 60 and CO 2 are molecules ....
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Ch_1_All - Chemistry-A Molecular Science Chapter 1 Early...

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