Question

Pcl5 is known but Ncl5 is unknown why

Answer 1

pcl5 is known because it has vacant d orbital where as ncl5 has no vacant d orbital.
that is why pcl5 is known ncl5is unknown

please mark as brainliest answer if you get help from this

Answer 2

Phosphorous has d-orbitals & hence

can accommodate the electrons

from Cl into them,in case of N the

d-orbitals are absent & electrons can be

accommodated only in p-orbitals.Hence

PC15 exists.