Pekka Pyykkö
Pekka Pyykkö (October 12, 1941)[1] is a Finnish professor of Chemistry at the University of Helsinki.[1] From 2009–2012, he was the chairman of the International Academy of Quantum Molecular Science. He is known for his extension to the periodic table of elements, called Pyykkö model.
Pyykkö model
Pekka Pyykkö predicts that the orbital shells will fill up in this order:
- 8s,
- 5g,
- the first two spaces of 8p,
- 6f,
- 7d,
- 9s,
- the first two spaces of 9p,
- the rest of 8p.[2]
He also suggests that period 8 be split into three parts:
- 8a, containing 8s,
- 8b, containing the first two elements of 8p,
- 8c, containing 7d and the rest of 8p.[2]
Template:Extended periodic table (by Pyykkö, 50 columns, periods 8–9)
The compact version.[2]
Pekka Pyykkö successfully predicted the possibility of a chemical bond between gold and the noble gas xenon, which is usually extremely inert; this bond is known to occur in the cationic complex tetraxenonogold(II) (AuXe2+
4). He also successfully predicted the possibility of a gold–carbon triple bond.[3]
References
- ^ a b "Curriculum vitae". chem.helsinki.fi. 2012-04-25. Retrieved 2012-05-28.
- ^ a b c Pyykkö, Pekka (2011). "A suggested periodic table up to Z≤ 172, based on Dirac–Fock calculations on atoms and ions". Physical Chemistry Chemical Physics. 13 (1): 161–8. Bibcode:2011PCCP...13..161P. doi:10.1039/c0cp01575j. PMID 20967377.
- ^ Scientific American June 2013, "Cracks in the Periodic Table". p. 72.
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