PS1 - Lewis structure and identify which bonds are ionic...

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CHEM 3A Problem Set 1 (January 23, 2009 ) NOTE: No problem sets will be turned in for 3A lecture! A. Write out the ground-state electron configuration for the following atoms and identify how many valence electrons each has: a) Magnesium b) Boron c) Silicon d) Calcium e) Sulfur f) Bromine B. Guess at what the most likely value for X is in the following molecules: a) AlCl X b) NI X c) CCl X F
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C. Lithium methoxide, LiOCH 3 , has both ionic and covalent bonds in it. Draw its
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Unformatted text preview: Lewis structure and identify which bonds are ionic and which are covalent. D. Identify the formal charge on Br, Al, and N atoms in the following molecule: E. An ancient wooden tool has a carbon-14 activity of 11.5 disintegrations per minute per gram of carbon. Current carbon-14 activity in fresh samples is 15.3 disintegrations per minute per gram of carbon, and the half-life of carbon is 5730 years. Calculate the age of the wood sample....
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This note was uploaded on 10/25/2009 for the course CHEM 3A taught by Professor Fretchet during the Spring '08 term at University of California, Berkeley.

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PS1 - Lewis structure and identify which bonds are ionic...

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