BIOL 1150 Lecture Notes - Lecture 4: Ionic Bonding, Chemical Polarity, Atomic Number

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17 Apr 2017
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Define an element and determine its atomic weight and atomic number. Explain how an isotope differs from an atom and give examples of the harmful and beneficial aspects of radiation exposure. Differentiate between polar covalent, non-polar covalent and ionic bond in terms of strength and the interaction of electrons. Describe the unique characteristics of water that make it valuable to biological systems. Describe what happens when an acid or a base is added to water. Why should we care about chemistry when this is biology class. All living and non-living things in the physical and natural universe are made up of atoms. Atoms are made up of sub-atomic particles: Two types of covalent bonding: non polar covalent bondin hydrogen molecule, polar covalent bonds in water molecule. The polarity of water makes it a great solvent. Why is water so special? a) water is polar b) hydrogen bonds form between water molecules. Oxygen is among the most electronegative of all elements.

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