11 . A
The closely spaced split d orbitals allow for relatively low energy transitions; these transitions
often occur in the visible region of the electromagnetic spectrum. The compound appears to
have a color that is complementary to the one that is absorbed. For example, if the transition
occurs in the red region of the spectrum, the compound will appear green.12 . A. Fr: metal
B. Pd: metal
C. I: nonmetal
D. B: semimetal
E. Sc: metal