K2Cr2O7 on heating with aqueous NaOH gives
CrO2-4
Cr(OH)3
Cr2O2-7
Cr(OH)2
Which of the following may be considered to be an organometallic compound?
Nickel tetracarbonyl
Chlorophyll
K3[Fe(C2O4)3]
[Co(en)3]CI3
Actinides
Are all synthetic elements
Include element 104
Have any short lived isotopes
Have variable valency
