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This 11 page Class Notes was uploaded by Corina Johnson on Tuesday February 23, 2016. The Class Notes belongs to 10584 at University of Houston taught by Dr. Lawrence Williams in Spring 2016. Since its upload, it has received 14 views. For similar materials see General Biology in Biology at University of Houston.
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Date Created: 02/23/16
The Chemical Basis of Life Matter Elements (their atoms) Molecules Compounds Subatomic structure – Protons: + charge, mass – Neutrons: no charge, mass – Electrons: - charge, mass-less ELEMENTS and terminology • Names • Elemental symbols • Atomic number (number of protons) • Atomic mass (# protons + # neutrons) • Atoms of elements are neutrally charged Helium atom, He TIFF(Uncompressed) decompressor are needed to see this picture. • IS THERE ANY VARIATION IN ATOMS? • YES….ISOTOPES AND SOME ARE RADIOACTIVE. • HYDROGEN AS AN EXAMPLE. Examples of Atoms CHEMICAL BONDS • Types of chemical bonds – Ionic bonds – Covalent bonds – Hydrogen bonds IONIC BOND • Electrons are lost and gained • Terms: reduction, oxidation, redox, ion Lesson in the lesson Na + Cl ---> NaCl Understand: Balanced equation Conservation of matter COV ALENT BONDS • ELECTRONS ARE SHARED IN PAIRS • SINGLE, DOUBLE, OR TRIPLE • POLAR AND NON-POLAR BONDS HYDROGEN BONDS • ELECTRICALATTRACTION: – BETWEEN DIFFERENTLY CHARGED PARTS OF DIFFERENT MOLECULES. – BETWEEN DIFFERENTLY CHARGED SITES WITHIN A MOLECULE.
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