I think the coolest element is Mn ,coz It's like a Chameleon, & I call it "the chameleon of chemistry"
but if you thought of it (the question) again, ALL elements are cool in a way or another...!!
Bismuth (Bi) is my personal favorite. The heaviest non-radioactive element, it floats on its liquid phase when it melts (like water) and has multiple solid phases (like water). As a solid it's a conductor, and as a liquid it's a semiconductor!
But, all that aside, human-made crystals of bismuth are BEAUTIFUL.
Ytterbium is the coolest element, because it is the main component of the mineral xenotime. With a name like xenotime, it's pretty difficult to go wrong.
Great posts everyone. We'll send everyone that participated in this thread their coolest element pin. Be on the lookout for your pin in the (snail) mail.
Keep advocating for your coolest element.
Hmm, here is a source which claims that bismuth is actually a teeny bit radioactive, albeit with an extremely slow decay rate. It also has a lovely picture of an artificially grown Bi crystal: http://www.chemicool.com/elements/bismuth.html
More on Phosphorus and its discovery in urine: Researchers at the Bristol Robotics Lab have found that urine could be used as an alternative power source where, instead of excreting it, the urine could be recycled to power a microbial fuel cell (MFC), a kind of fuel cell that uses bacterial cultures to break down 'food' to create power. Dr. Ioannis Ieropoulo, a researcher on this project, explains: "Urine is chemically very active, rich in nitrogen and has compounds such as urea, chloride, potassium and bilirubin, which make it very good for the microbial fuel cells. We have already done preliminary tests which show it being a waste material that is very effective.” Although it is in the early days for this research, he hopes “to work towards producing a prototype portable urinal which would use urine to create power from fuel cells. We envisage that this could be used, for example, at music festivals and other outdoor events." How's that for not "peeing" away a power source.
I have a fond spot for tungsten, but the coolest has to be anti-hydrogen (1 anti-proton + 1 positron). It is (for now) rarer than the super-heavy elements that have recently been synthesized.
Urea is in fact a product of Arginase catalitic power in highly proliferative cells. It was long belived that arginase is expressed only in hepatic cells considering urea a waste molecule, although we now know that Arg is very conserved piece of protein that is directly invilved in cell division and regulative processes due carbon modulation of omics dynamics, therefore matter amplification processes. I was the first to propose urea and to reveal the quantum chemical mechanism of Carbon Nitrogen interference driven by phosphates as a substrate of pyrimidine base synthesis which in fact generates methane and/ or methyl radicals as by-products of small bases generation functionally linked to mutability. Story gets a lot more interesting. For more on that: