JEE Main 2026 — Structure of Atom Question with Solution

The 2s orbital has one radial nodal surface, which is a spherical surface shown in Figure 1.
A nodal surface is where the electron probability density (and wave function) equals zero, meaning ${\psi }_{2s}(x)=0$.
From the wave function graph in Figure 2, point B represents where the wave function crosses zero on the x-axis, indicating the location of the radial node.
Points A and C show maximum and minimum values respectively, while point D shows a non-zero region beyond the node.