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Recitation 4 - Fall CHEM 110-1 What is the maximum number...

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Fall CHEM 110 Recitation 4 ------------------------------------------------------------------------------------------------------------ 1. What is the maximum number of electrons that can have n = 3 and m s = + ½ ? ------------------------------------------------------------------------------------------------------------ 2. Consider the highest energy electron in the ground state of Mg. Which of the following orbitals would this electron be in? Give the subshell designation (e.g., 2p, 1s, 3d, etc.). ------------------------------------------------------------------------------------------------------------ 3. Which of the following could not be an orbital diagram for an atom in its ground state? 1s 2s 2p 3s A. ( ) ( ) ( ) ( ) ( ) B. ( ) ( ) ( ) ( ) ( ) ( ) C. ( ) ( ) ( ) ( ) ( ) D. ( ) ( ) ( ) ( ) ( ) ( ) E. ( ) ( ) ( ) ( ) ( ) ------------------------------------------------------------------------------------------------------------ 4. The following represent electron excited states (What is the difference between excited and ground states?). Determine the element and write the ground-state condensed electron configurations for the following: (a) 1s 2 2s 2 3p 2 4p 1 (b) [Kr] 4d 6 5s 2 5p 1 . ------------------------------------------------------------------------------------------------------------ 5. Which of the following would have to lose two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br ------------------------------------------------------------------------------------------------------------
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