chapter 4 Living chemsitry.odt

chapter 4 Living chemsitry.odt - CHAPTER 4 LIVING CHEMISTRY...

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CHAPTER 4: LIVING CHEMISTRY Atom smallest unit of an element A positively charged nucleus that contains protons and neutrons, surrounded by negatively charged electrons. number of protons determines the type of atom, called an element. valence electron Carbon is “tetravalent”? how does that characteristic contribute to its importance in organic molecules Cause form 4 covalent bond strong difficult to break. Non-polar Polar Both atoms similar electroneg, the electrons in a covalent bond shared equally unequal electron sharing. The molecule has a partial positive and neg poles. Covalent bonds Sharing electro between 2 atoms. Double bond , dif to break- strongest. Ionic bond Obtain full outer shell by gaining or losing electrons Anions (-) cations (+) also known as electrolites bc conduct electricity. Hydrogen bond Only form 1 covalent bond. water essential for life? Where do the properties of water derive from?
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