mse220hw1 - Michael Mark 22838947 19 January 2009 MSE 220...

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Michael Mark 22838947 19 January 2009 MSE 220 HW #1 Problems :  2.20, 2.22, 2.23, 3.6, 3.13 2.20. Using the linear trendline to approximate the bonding energy for the metal molybdenum  (see the plot below).  Given that the melting temperature is 2617 degrees Celsius, I was  able to estimate that molybdenum has a bonding energy of about 680 kJ/mol . 2.22. Using the bonding decision tree, the expected bonding types were determined for each  of the follow materials listed below:
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Solid xenon bonding is van der Waals since xenon in its normal state has all of its  shell filled up by electrons.  Therefore there is bonding between atoms when it is a  solid. Calcium Fluoride (CaF 2 ) bonding is ionic since a metal is bonding with a nonmetal  and the positions of the elements are far.  After calculating the difference in  electronegativity between calcium and fluorine, it turned out to be 3.0 which is  greater than 1.7, thus making the bond expected to be ionic.
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