Statement-I : Number of angular nodes is equal to azimuthal quantum number.

Statement-II : Both ‘1s’ orbital and ‘2s’ orbital have same number of nodal regions.

Number of angular nodes (nodal planes) = ‘l’

Number of radial nodes (nodal regions) = (n-l-1)

Number of radial nodes (nodal regions) for 1s orbital = 1 - 0 - 1 = 0

Number of radial nodes (nodal regions) for 2s orbital = 2 - 0 - 1 = 1.