>
> From my brother, and too much fun not to share:
>
> Remember science class? When only the teacher was
> allowed to drop a sand grain of potassium into water
> and watch it burn? Or perhaps he would ignite a small
> wafer of magnesium which would then burn as bright as
> a welding torch?
>
> Well, this British TV show says Hah! to such controlled
> piffle. They drop entire vials of the highly reactive
> alkaline metals rubidium and cesium into bathtubs full
> of water, and then run away while the cameras roll to
> film the explosions. A true guy's show. OK, a true
> adolescent lad's show, but still.
>
> http://www.easy2remember.name/media/67/Rubidium-and-cesium-in-
> water.html
Very cool!
Here's a tiny URL for it:
http://tinyurl.com/ortfr
As for why they couldn't get a hold of some Francium:
http://www.webelements.com/webelements/elements/text/Fr/key.html
"Francium occurs as a result of [alpha] disintegration of actinium.
Francium is found in uranium minerals, and can be made artificially by
bombarding thorium with protons. It is the most unstable of the first
101 elements. The longest lived isotope, 223Fr, a daughter of 227Ac,
has a half-life of 22 minutes. This is the only isotope of francium
occurring in nature, but at most there is only 20-30 g of the element
present in the earth's crust at any one time. No weighable quantity of
the element has been prepared or isolated. There are about 20 known
isotopes."
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