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« on: January 15, 2009, 09:51:23 am »
hah, beaten to the chemistry by legolord.
salt also has chlorine, which is very poisonous. you may have heard of it as mustard gas, which was used extensively in ww1.
so yeah, reactive and explosive things dont occur by themselves naturally, they are allways with something else and need to be extracted if you want them to go bang, and getting pure reactive sodium requires modern technology, like electrolosys.
which, interestingly, is why aluminium is so valuable in DF. prior to modern methods of removing aluminium from its ores, it was held as stupidly valuable because of how rare it was to find it in its pure metallic form. napolean III of france aparently had his second best set of dinner plates made of solid gold, and his very best set made from aluminium. which seems silly now as aluminium is now a cheap, readily available and widely used metal.
so if you get prior warning that your soon to be thrust into the distant past, take a bunch of old crushed aluminium cans for portable wealth.