The electronic configuration of the last layer for the elements of group 15 from nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb) and bismuth (Bi) starts with? A) 2s12p2 and ends with 7s27p3 B) 2s22p2 and ends with 6s26p2 C) 2s22p3 and ends with 6s26p3 D) 3s13p2 and ends with 5s25d3