Xenon is the sixth element with electrons in the 5p orbital. Xenon has five full shells. Like neon, argon, and krypton, it achieves symmetrical stability without the need to hybridize its 5s and 5p orbitals. It is not as unreactive as the other noble gases since its large size lowers its ionization energy to the point that it can bond with, for example, the electronegative oxygen and fluorine atoms.
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