Isostructural pairs have same hybridization and shape.
`NF_(3)`: Lewis structure `F-underset(F)underset(|)(ddot(N))-F: sp^(3)`, Triangle pyramidal
`NO_(3)^(-)` Lewis structure

`,sp^(2)`, Triangular planar
`H_(3)O^(+)` Lewis structure `H-underset(H)underset(|)(ddotO^(+))-H,sp^(3)` Triangle pyramidal
`HN_(3)` Lewis structure `H-ddot(N)=Nvec(-)N:` ,sp, linear
Thus, isostructural pairs are `[NF_(3),H_(3)O^(+)]` and `[NO_(3)^(-),BF_(3)]`