12 th answer should be nh2 - n? and pla explain 13 th oble gas configuration with 18 electrons in its outer shell 12.n which of the following the cent

cd Ca2 ion has noble gas configuration while Cd-10n has pseudo noble gas configuration with 18 electrons in its outer shell 12.n which of the following the central atom does not use sp°-hybrid orbitals in its bonding. (6) OH (c) NH (d) NH (a) BeF 13. In an octahedral structure, the pair of d-orbitals involyed in d sp hybridisation is (a) d d2 (b) dd (c) d2,d (d) dy dy