Chemistry 161. Test Four. May 01, 2015. Name _____________________________________________(
/86)
This test is pledged non-disclosure until it is returned.
Part One. 33 points, 2 points each.
_____1) For the following pairs of atoms – Cs or K, Na or Mg - which will have the greatest first ionization energy?
a- K and Mg
b- Cs and Mg
c- Cs and Na
d- K and Na
_____2) For the following pairs – Br or Br1-, Co3+ or Co2+ - which will have the largest radius?
a- Br and Co2+
b- Br1- and Co2+
c- Br1- and Co3+
d- Br and Co3+
_____3) The effective nuclear charge for the valence electrons in phosphorus is
a- +1
b- +5
c- +3
d- -4
_____4) Which of the following species is an alkali metal?
a- calcium
b- carbon
c- cesium
d- chromium
_____5) Which of the following states would not be expected for bismuth
a- +3
b- 0
c- +5
d- +1
_____6) Which of the following species would we expect to be ionic?
a- CO2
b- CaF2
c- SiO2
d- SF4
_____7) For the following pairs of atoms – S or As – Ca or Ni -which will have the greatest electronegativity?
a- S
b- As
c- Sr
d- Mo
_____8) Which of the following compounds is polar?
a- SeCl4
b- CCl4
c- BrF41d- NO2+
_____9) For which of the following molecules will the electron pair geometry be linear?
a- SO2
b- H2O
c- CS2
d- O3
_____10) Which of the following molecular geometries is not found in a species with an electron pair geometry of
trigonal bipyramidal?
a- T
b- bent
c- see saw
d- linear
_____11) Which of the following species is paramagnetic?
a- Kr
b- CO2
c- SO42d- NO2
_____12) Which of the following species is diamagnetic?
a- Br1b- Ga
c- NH3
d- O2
_____13) What is the maximum number of electrons that any orbital can hold?
a- 2
b- 1
c- 3
d- will depend on the orbital
_____14) A triple bond in a molecule is comprised of
a- two  bond and one  bonds
b- three  bonds and no  bonds
c- no  bonds and two  bonds
d- one  bond and two  bonds
Part Two.
1) (9 points) Definitions
Electronegativity
Electron affinity
Covalent bond
2) (8 points) Nomenclature.
Name
a-
Ionic or Molecular Formula
H2SO4
b-
Cobalt(III) chloride
c-
P2S5
d-
Ammonium sulfate
3) (15 points) Give the complete ground state electron configuration for each of the following species (no shortcut
notation)
Zn2+
Se2-
Cd
Ge2+
H1-
4) (21 points) For each of the following spcvecies-draw the proper Lewis dot structure
-give the hybridization of the central atom
-show the formal charge on each atom of the structure
-give the electron pair geometry
-give the molecular geometry
-is the species polar
BrF21-
TeF51-
NO31-