Chemists at the Polish Academy of Sciences have discovered that the element krypton may not be quite as unreactive as antecedently thought , and that while it might not be capable to shape Superman - dispatch kryptonite crystals – for which it would involve to bond with nitrogen – it can bond with oxygen , form krypton monoxide .

As anoble natural gas , krypton ’s atom have a fullouter shell of electrons , and therefore expose an uttermost reluctance to undergo chemical reaction and bond with other substances to mold mote . Therefore , like other noble gases such as He and argon , krypton was for a foresightful time cogitate to be inert .

However , in 2003 , scientistsreportedthat under sure uttermost conditions , krypton could be coaxed into reacting with hydrogen and atomic number 6 molecule to form compound . work up on this , a newfangled subject area in the journalScientific Reportsprovides grounds that krypton can also bond with oxygen to form krypton oxides , but only under intense pressure .

Though the bailiwick authors did not in reality celebrate this chemical reaction in pattern , they did usegenetic algorithmsin order to determine the theoretic likeliness of krypton - O molecule shape . Such algorithms enable scientists to simulate the chemical interactions between corpuscle and molecules under pre - defined hypothetical consideration , and have previously been used to reliably predict the viability of many chemical reactions .

According to the team ’s calculation , krypton and oxygen atoms can be brought close enough together to form acovalent trammel – whereby an electron is portion out between the two speck – at a pressure of 285 gigapascals . The stability of the compound generate by this response is subject upon several factor , such as the number of shackle formed and the spatial organization of speck in relation to one another .

For instance , allot to the algorithms used by the researchers , these compounds can only survive if the ratio between krypton and O atoms is 1:1 , producing krypton monoxide . Moreover , stability can only be maintain if atom are get in touch to each other in zig - zag chain , with no intermolecular bonds between these range of mountains .

When this occur , the substance – which should live as a dark watch crystal – can persist intact even when the pressure is upgrade to 500 gigapascals . However , since such utmost pressures only happen deep within the core of some planets , where neither oxygen nor krypton are establish , it seems impossible that krypton monoxide could in reality exist in nature .