Xenon forms compounds with F and O because: (1) Xe has low IE and large polarisable electron cloud. (2) F is small and highly electronegative — Xe-F bonds are strong. XeF2: Linear, sp3d, 3 lone pairs, formed by mixing Xe and F2 (2:1) at 400°C. XeF4: Square planar, sp3d2, 2 lone pairs, Xe:F2 = 1:5, 400°C, 6 atm. XeF6: Distorted octahedral, sp3d3, 1 lone pair. Hydrolysis: XeF2 + H2O → Xe + 2HF + 1/2O2; XeF4 + 6NaOH → Na2XeO3 + Xe + 6NaF + 3H2O (disproportionates); XeF6 + 3H2O → XeO3 + 6HF. XeO3 is explosive and trigonal pyramidal.