1. a. Write the symbols (including correct ionic charge for two cations that are
isoelectronic with an atom of neon:
b. Write the symbols (including correct ionic charge)
for two anions that are isoelectronic with an atom of neon:
c. Write the correct ground-state electron configuration for neon:
2. The family of elements characterized by very low first and second ionization energies
but a very high third ionization energy is:
3. Identify the following compounds as either being ionic or covalent (molecular):
a. H2O
b. Na2O
c. FeCl3
d. NH4Cl
e. PCl3
4. Write formulas for the following:
a. mercury(II) oxide
b. sodium oxide
c. nitrogen trichloride
d. lead(IV) nitrate
e. tin(IV) sulfide
f. aluminum oxide
g. potassium chromate
h. calcium hydroxide
i. carbon disulfide
j. ammonium sulfide
5. Write Lewis electron dot structures for the following ions or molecules:
a. NH3
b. (CO3) ^2- (carbonate ion)
c. HNO3
d. C2H4
e. CO2
6. Indicate whether the following bonds are ionic, nonpolar covalent, or polar covalent:
a. H-O
b. Ca-O
c. N-Cl
d. Na-Cl
e. C-Cl
University of Wisconsin-Stout Department of Chemistry Jarvis Hall 303I Science Wing Menomonie, WI 54751 (715)-232-2292
ondrusm@uwstout.edu