Name: ___________________________________________________
Lecture Period:
9 a.m.
10 a.m.
Exam 3A
SHOW ALL WORK!!! NO WORK, NO CREDIT!!! SHOW ALL WORK!!! NO WORK, NO CREDIT!!! SHOW ALL
WORK!!! NO WORK, NO CREDIT!!! SHOW ALL WORK!!! NO WORK, NO CREDIT!!! SHOW ALL WORK!!!
1.) Write the electron configuration for Zn and Zn+2. Draw all the orbital boxes for the neutral atom. Be sure
to label the orbital boxes that you draw! Write the complete set of quantum numbers for electrons 11, 12,
22, and 28. (8 pts)
2.) Draw 3 valid Lewis structures for N2O (as written with the second N as the central atom) and comment on
which structure(s) will contribute more to the overall resonance hybrid. PROVE this, no guessing! (10 pts)
3.) Put the following in order of increasing size. Put the smallest species on the LEFT and then arrange them
in order of increasing size with the largest species on the RIGHT: Be +2, O-2, Li+1, B+3, N-3, F-1. (4 pts)
1
4.) Fill in the table with the appropriate values/information
Formula
Valence electrons
(11 pts)
HBrO+2 (as written)
Follow octet
XeF4
HNCl2 (N central)
No Cl-Cl bonds
H:
Xe:
H:
Br:
F:
N:
O:
Cl:
Total:
Total:
Total:
H:
Xe:
N:
Lewis structure
(17 pts)
e- configurations
(7 pts)
Br:
Cl:
O:
F:
H:
Xe:
H:
Br:
F1:
F2:
F3:
F4:
N:
H:
Xe:
H:
Br:
F1:
F2:
F3:
F4:
N:
Identify which bonds are
polar bonds
(5 pts)
Formal charge
(4 pts)
O:
Oxidation #
(4 pts)
O:
2
Cl:
Cl: