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Periodic table group numbering

paulsutton
in Inorganic Chemistry

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I have asked this on Mastodon, as it was related to another post I made there, but I thought I would ask here too

Group 4 elements on the @compoundchem@mstdn.social infographic

Carbon, Silicon etc,

https://www.compoundchem.com/2013/12/29/group-4/

Whereas Wikipedia

https://en.wikipedia.org/wiki/Group_4_element

Suggests group 4 is Titanium, Zirconium, Most periodic tables are group 1,2 on the left, then there is a jump over the transition to group 3, Boron, Aluminum, Transition element groups are numbered IIIB, IVB (which wikipedia lists as group 4) 2nd group of the transition elements.

So which is correct here, or does it depend on the periodic table you are looking at?

Paul

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