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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: human on May 14, 2018, 06:40:13 PM

Title: B family of periodic table
Post by: human on May 14, 2018, 06:40:13 PM

Why the B elements of periodic table begin IIIB, IVB, ... , IIB?

Title: Re: B family of periodic table
Post by: Arkcon on May 14, 2018, 06:55:01 PM

They've had many different names, at different times, for either important (at the time, to some people) or for trivial, reasons.  Or am I being redundant?

https://en.wikipedia.org/wiki/Group_(periodic_table)#Group_names

Title: Re: B family of periodic table
Post by: human on May 15, 2018, 12:52:57 AM

The numbers indicate approximately the highest oxidation number of the elements in that group.

(https://i.imgur.com/sTjvanS.png)

That phrase is correct? I'm in doubt why is not it in increasing order, the B family begin 3 and at the end becomes 4? Thanks in advance.

Title: Re: B family of periodic table
Post by: Arkcon on May 15, 2018, 07:39:59 AM

I think the explanation is crazy.

The numbers indicate approximately the highest oxidation number of the elements in that group, and so indicate similar chemistry with other elements with the same numeral. The number proceeds in a linearly increasing fashion for the most part, once on the left of the table, and once on the right

So, since the two formats agree, Group 8, the "Iron Family" either VIIIA or VIIIB depending, have +8 oxidation numbers or oxidation states? Well, ruthenium does, but iron doesn't.