`""_(78)Pt` is present in group 10 of the Periodic Table. Its outer configuration is `5d^(9)6s^(1)`
For square plannar shape, the hybridization is `dsp^(2)` Hence, the unpaired electrons in 5dorbital pair up to make one d-orbital empty for `dsp^(2)` hybridization. Thus, there is no unpaired electron.
