This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Atomic numbers and electronic configurations are:
P  : 15 : 1s2 2s2  2p6   3s2  3p3                 :  3 in the 3p orbital
Si : 14 : 1s2 2s2 2p6  3s2  3p2                   :  2 in 3p orbital
Cr: 24  : 1s2  2s2  2p6 3s2 3p6 4s2 3d4      :  4 in the 3d orbital..
Fe: 26 : 4s2  3d6             4 in the 3d orbital..  2 electrons are paired in 3d orbital.
Kr: 36  :   4s2 3d10  4p6        there are not any -- it is an ideal gas config..
           as all orbitals are full and paired.

1 5 1
click on thanks button above please