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exam2ans_2006 - Exam 2 CEM 151 October 18 2006 Name Section...

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Exam 2 CEM 151 October, 18, 2006 Name ___________________ Section __________________ PID _____________________ Multiple choice (3 points each). 1. The _______ quantum number is most responsible for defining the shape of an orbital. a. spin b. azimuthal c. Ψ d. magnetic e. n f. m s 2. There are _______orbitals in the third shell. 3. The azimuthal quantum number is 3 in _______orbitals. 4. Electrons in the ______ subshell of tin experience the lowest effective nuclear charge. a. 1s b. 3p c. 3d d. 5s e. 5p f. 4f 5. [Ar]4s 2 3d 10 4p 3 is the electron configuration for a(n) __________atom.
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6. The ground state electron configuration for a Cd atom is: a. [Ar]4s 2 4d 9 b. [Kr]5s 2 4d 10 c. [Kr]5s 2 3d 9 d. [Xe]5s 2 5d 10 e. [Kr]5s 2 3d 10 f. [Xe]5s 1 5d 11 7. How many unpaired electrons are in an Arsenic (As) atom? 8. How many valence electrons are there in Ni? 9. What are the valence electrons in Zn? 10. Suppose that the spin quantum number m s had four possible values instead of two. How many elements would then be in the first two rows of the periodic table? a. 8 b. 10 c. 14 d. 20 e. 28
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