Mercury is the only liquid metal and the only liquid element except for bromine .
Other nations have signed since then, and recent studies indicate that the levels of bromine , another ozone-destroying chemical, are actually dropping.
The spa's thermal waters, which bubble out of the ground at 38 degrees centigrade, have a high incidence of sulphate sodium, bromine and iodine and are particularly beneficial for those with respiratory conditions.
The ozone depleting compounds contain combinations of the elements chlorine, fluorine, bromine , carbon and hydrogen.
The elements that appear enriched from measurements that Spirit took with her alpha particle x-ray spectrometer are potassium, phosphorous, sulfur, chlorine, bromine .
For instance, electronegativities in the halide sequence fluorine, chlorine, bromine , and iodine decrease from fluorine through iodine.
Recent experiments have begun identifying oxidizing gases, such as ozone and molecules containing the halogens bromine and chlorine, as triggers for that mercury fallout.
Dry chlorine, iodine, bromine and fluorine cause little or no corrosion of magnesium at room or slightly elevated temperature.
The two main ingredients are reactive halogen gases such as chlorine or bromine and sunlight.
‘While chlorine and bromine chemicals cause the ozone hole, temperature is also a key factor in ozone loss,’ Newman said.