CHEMISTRY 130 Practice Exam 2A - Practice Exam 2A 1 Which...

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Practice Exam 2A
1. Which one of the following represents an acceptable set of quantum numbers for
an electron in an atom? (arranged as n, l, m
l
, and m
s
)
A) 2, 2, -1, -1/2
B) 1, 0, 0, 1/2
C) 3, 3, 3, 1/2
D) 5, 4, -5, 1/2
E) 2, 3, 3, -1/2
2.
[ ]
3 10 2 4 3 4 p d s Ar is the electron configuration of a(n) atom.
3. The angular momentum quantum number of the last two valence electrons in an atom
of lead is
4. In which of the following atoms is the 2s orbital closest to the nucleus?
5. In general, as you go across a period in the periodic table from left to right:
(1) the atomic radius____________
(2) the electron affinity becomes __________negative
(3) the first ionization energy ________________
A) decreases, decreasingly, increases
B) increases, increasingly, decreases
C) increases, increasingly, increases
D) decreases, increasingly, increases
E) decreases, decreasingly, decreases

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