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Unformatted text preview: Copyright 2010 TOUPADAKIS CHEMISTRY READER 2A ADDITIONAL EXERCISES FOR UNITS 7-9 1 ADDITIONAL EXERCISES FOR UNITS 7-9 CONCEPTS (Select the best answer) 1. Rank in order of increasing ionic radius the ions: P 3- , K + , Cl- . a. K + < Cl- < P 3- b. P 3- < Cl- < K + c. Cl- < K + < P 3- d. K + < P 3- < Cl- e. None of the above 2. How many electrons a Cr 3+ cation must lose to become diamagnetic? a. 0 b. 1 c. 3 d. 4 e. 5 3. What two elements have 3d 10 as part of their electron configuration? a. Scandium and Titanium b. Scandium and Cobalt c. Iron and Copper d. Nickel and Zinc e. Copper and Zinc 4. Draw the Lewis electron dot diagram for CN and determine how many bonds are between the carbon atom and nitrogen atom? a. 0 b. 2 c. 1 d. 3 e. There are no bonds 5. Which element is classified as metalloid or semimetal? a. oxygen b. carbon c. bromine d. germanium e. cesium Copyright 2010 TOUPADAKIS CHEMISTRY READER 2A ADDITIONAL EXERCISES FOR UNITS 7-9 2 6. The phosphate salt of a metal M has the chemical formula of M 3 (PO 4 ) 2 . The chemical formula of the nitride of the same metal M is: a. MN b. M 3 N 3 c. M 2 N 2 d. M 3 N 2 e. M 2 N 3 7. Rank in order of decreasing ionic radius: F- , Mg 2+ and Na + a. F- > Mg 2+ > Na + b. Na + > F- > Mg 2+ c. F- > Na + > Mg 2+ d. Mg 2+ > Na + > F- e. Mg 2+ > F- > Na + 8. Consider the following atomic radii: Ca = 180 pm, Fe = 140 pm, and Br = 115 pm....
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This note was uploaded on 04/22/2011 for the course CHEM 2A taught by Professor Guo during the Fall '08 term at UC Davis.
- Fall '08