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As the london underground has countless disused stations how do engineers go about closing the line,do they fill it in with concrete,brick it up or simply leave it:confused:

What is the most lethal non radioactive chemical out there,you know,the sort of stuff that would melt you down in seconds and leave you in a yellow and green mush,iv` been arguing with my friend,im`r...

I don`t think they hand it out to the general public,it is quite dangerous you know:eek: :eek: :eek:

As we all know about the reaction of alkaline metals,and that caesium is absolutely mental I am curious to know if anyone has had the courage or stupidity to obtain any francium and place it in...