Ausma wrote: So interesting! I choose gallium most known property of that element is that it`s solid metal (alluminium analogue) in temperature until ~ +30 C, then it melts, so summer`s heat and sunshine would be enough to melt it. Once I read about such case (read it in paper variant in Russian, in journal "Chemistry and Life", can`t give more normal link: link, look 6/6);