Actinides
Are all synthetic elements
Include element 104
Have any short lived isotopes
Have variable valency
The oxidation state of Cr in K2Cr2O7 is
+5
+3
+6
+7
Which of the following may be considered to be an organometallic compound?
Nickel tetracarbonyl
Chlorophyll
K3[Fe(C2O4)3]
[Co(en)3]CI3
