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

Main article: Pyykkö model

Pekka Pyykkö predicts that the orbital shells will fill up in this order:

He also suggests that period 8 be split into three parts:

Pyykkö model
Displaced elements are in boldface
 8  119
Uue		 120
Ubn		 121
Ubu		 122
Ubb		 123
Ubt		 124
Ubq		 125
Ubp		 126
Ubh		 127
Ubs		 128
Ubo		 129
Ube		 130
Utn		 131
Utu		 132
Utb		 133
Utt		 134
Utq		 135
Utp		 136
Uth		 137
Uts		 138
Uto		 141
Uqu		 142
Uqb		 143
Uqt		 144
Uqq		 145
Uqp		 146
Uqh		 147
Uqs		 148
Uqo		 149
Uqe		 150
Upn		 151
Upu		 152
Upb		 153
Upt		 154
Upq		 155
Upp		 156
Uph		 157
Ups		 158
Upo		 159
Upe		 160
Uhn		 161
Uhu		 162
Uhb		 163
Uht		 164
Uhq		 139
Ute		 140
Uqn		 169
Uhe		 170
Usn		 171
Usu		 172
Usb
9 165
Uhp		 166
Uhh		 167
Uhs		 168
Uho
  s-block g-block f-block d-block p-block

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

  1. 1 2 "Curriculum vitae". chem.helsinki.fi. 2012-04-25. Retrieved 2012-05-28.
  2. 1 2 3 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.
  3. ↑ Scientific American June 2013, "Cracks in the Periodic Table". p. 72.
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