Xenon

In nature, xenon is found in the Earth's atmosphere, 0.087 ppm (v/v), frequently found in gases from thermal springs [5, 8].

The isotopes found in nature are ¹²⁴Xe (0.10 %, stable), ¹²⁶Xe (0.09 %, stable), ¹²⁸Xe (1.90 %, stable), ¹²⁹Xe (26.4 %, stable), ¹³⁰Xe (4.1 %, stable), ¹³¹Xe (21.2 %, stable), ¹³²Xe (26.9 %, stable), ¹³⁴Xe (10.4 %, stable) and , ¹³⁶Xe (8.9 %, stable) [5].

Xenon is produced by fractional distillation of liquid air [4, 8].