What is the group number or name for elements between group 3 and 4 (F-block) on the periodic table? I noticed when I look at a periodic table of elements, the elements of the F-block between group 3 and 4 doesn’t have a group number. Are they just refer as Lanthanide,and Actinide or Inner Transition Elements, But why doesn't they have a group number, it least it appear that way.
Link to a wide version of Periodic table of Elements so you can see what I am talking about. http://en.wikipedia.org/wiki/Template:Periodic_table_%28wide_large%29