Transition Element Question

[artsyme]

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I know this may not be that important, but its really been bugging me....
Every group shares the same number of valence electrons, indicated by Group [roman numeral]. However, I can't seem to figure out why the transition elements go from Group IIIB to IVB to.... VIIIB, VIIIB,VIIIB

can someone explain this to me please? Thanks!

😕

 

[JMJRDH1]

The group A elements are called the representative elements, because they each more or less "represent" their own groups according to physical/chemical properties.

The group B elements are called transition elements because they sometimes have characteristics from more than one group or representative elements because they have an incomplete d-subshell. They are also capable of multiple oxidation states, like Fe2+ and Fe3+.

As far as your questions about the roman numerals, just count across the periodic table IA, IIA, then jump down to the transition elements IIIB, IVB, VB, VIB...............then jump back up to 13A, 14A, etc.

Hope this helps!

 

[DentalKitty]

This kind of explains it, has to do with most stable oxidation states....

http://answers.yahoo.com/question/index?qid=20060609045851AAOi9a7