• # question_answer The graph between $|\psi {{|}^{2}}$and r(radial distance) is shown below. This represents :- [JEE Main 10-4-2019 Morning] A) 3s orbital                     B) 1s orbitalC) 2p orbital                    D) 2s orbital

Graph of $|\psi {{|}^{2}}$v/s r, touches r axis at 1 point so it has one radial node and since at r = 0, it has some value so it should be for 's' orbital. $\therefore n-\ell -1=1$where $\ell =0\Rightarrow n-1=1$ $\therefore n=2\Rightarrow '2s'$ orbital