Oriented beams of NO molecules have been scattered from a Ru(0001)-(1×1)H surface. The interaction of NO with Ru-H is found to have both a strong orientation and lateral dependence. The angular distributions for N-end and O-end scattering are quite different, and demonstrate that in the chemisorbing region of the unit cell the N-end is strongly bonding, while the O-end is essentially repulsive. Above the so-called mirror reflection region the N-end and O-end interaction are equally repulsive. © 2004 Elsevier B.V. All rights reserved.