The simple fluorides XeF2, XeF4, andXeF6 are all formed by direct reaction of the elements. "Inert" xenon actually forms several compounds, especially with the highly electronegative elements oxygen and fluorine. As you might expect from the size of the xenon atom, the Xe-F bond is not a strong one. Estimate the Xe-F bond energy in XeF6, given that the heat of formation is -402kJ/mol.