Question 1
Which of the following metal ions has coordination numbers of 2 or 4?
◦ Fe
3+ ◦ Co
3+ ◦ Cu
+ ◦ Pt
2+ ◦ Cr
3+ Question 2
Which of the following species is diamagnetic?
◦ an isolated gas-phase Cr
3+ ion
◦ a high-spin octahedral Cr
2+ complex
◦ an isolated gas-phase Cu
2+ ion
◦ a low-spin octahedral Co
3+ complex