ws3f09 - CH301 Fall 2009 Worksheet 3 on Electronic...

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CH301 Fall 2009 Worksheet 3 on Electronic Configuations and Periodic Table Trends 1. Write the electron configuration of gallium (Ga) in long notation and in short notation. 2. Write the electron configuration of a divalent vanadium cation (V 2+ ) in long and in short notation.3. Write the electron configuration of a monovalent iodine anion (I - ) in long and in short notation. 4. State in your own words the Pauli exclusion principle. Which of the quantum numbers is it most concerned with? 5. Which ground state element corresponds to the following electron configurations? a. [Rn] 5f 14 6d 3 7s 2 b. [Ne] 3s 2 3p 4 c. [Xe] 4f 14 5d 6 6s 2 d. [Xe] 4f 14 5d 10 6s 1 6. In your own words, what does Hund's rule state? 7.In which region of the periodic table do we find most of the exceptions to Aufbau for neutral, ground state elements? What about cations (positively charged ionic species)? 8. Write the electron configuration for silver. Try to give at least one example of an ion that would have an identical electron configuration.
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