No, it would not be possible to give the Moon a substantial atmosphere of xenon, radon, or oganesson, even if you could create enough of these gases. The reason is that the Moon's escape velocity is relatively low, which means that gas molecules would escape into space quickly.
The escape velocity is the minimum velocity an object needs to escape the gravitational pull of a celestial body. For the Moon, its escape velocity is about 2.38 kilometers per second (km/s), which is much lower than Earth's escape velocity of 11.2 km/s.
Xenon, radon, and oganesson are all noble gases, which are characterized by having low boiling points and weak interatomic forces. This means that their individual gas molecules have relatively high average velocities at a given temperature. Due to their high velocities, the gas molecules would readily achieve escape velocity and escape into space, causing a continuous loss of atmosphere.
Additionally, the Moon lacks a significant magnetic field to protect the atmosphere from the solar wind, which consists of high-energy particles ejected by the Sun. The solar wind would further strip away any gas molecules that manage to linger in the Moon's vicinity.
Therefore, given the Moon's low escape velocity and lack of a protective magnetic field, it would not be possible to create and maintain a substantial atmosphere of xenon, radon, or oganesson on the Moon.