Nodes A node is a surface on which an electron is not found. For a given orbital,the total number of nodes equals n-1. The number of angular nodes is I. s(=0) p(=1) dy=2) d2(l=2) f(=3) 9(=4) 2.4 The structure of many- electron atoms (multi-electron atomsNodes A node is a surface on which an electron is not found. For a given orbital, the total number of nodes equals n-1. The number of angular nodes is l. 2.4 The structure of many￾electron atoms (multi-electron atoms)