

InterviewSolution
Saved Bookmarks
1. |
11.An element with configuration 1s2 2s22p6 3s23ps is(A) trivalent(B) tetravalent(C) pentavalent(D) both A & C |
Answer» <p>There must be also15protonsin the element's nucleus. And thus ifZ=15, the element must bephosphorus. it is a pentavalent compound</p> | |