In the cation [CoCl2(en)2]+, the oxidation state of cobalt and its coordination number, respectively, are ________.
A) -3 and two
B) +2 and six
C) +4 and four
D) +3 and six
E) -4 and six

Give the correct name for [Fe(H2O)4(OH)2]+.

A) diaquotetrahydroxoiron(III)
B) tetrahydroxodiaquoferrate(III)
C) hydrated iron hydroxide
D) tetrawaterdihydroxoiron(III)
E) tetraaquadihydroxoiron(III)

What is the correct IUPAC name for K3[Co(NO2)6]?

A) tripotassiumhexanitritocobalt(0)
B) tripotassiumhexanitritocobalt(III)
C) potassium hexanitritocobaltate(III)
D) potassium hexanitritocobalt(III)
E) potassium hexanitratocobalt(III)

Ligands approaching in a tetrahedral pattern cause some orbitals to be raised in energy. How many orbitals are on the lower energy level?

A) 1
B) 2
C) 3
D) 4
E) 5