It kills you?Anyway, I like Xenon, it's just cool (I wish deuterium was on it :c)
Since when does Mercury kill people?!I'll have you know, it is a vital element in the functioning of the human body!
http://en.wikipedia.org/wiki/Mercury_poisoning
Symptoms typically include sensory impairment (vision, hearing, speech), disturbed sensation and a lack of coordination....neuropsychiat ric symptoms such as emotional lability, memory impairment, or insomnia.