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quote:it would appear that the ionisation energy of Ceasium is lower than Francium although Francium is apparently slightly more electronegative
quote:Originally posted by epeiusit is believed that due to its highly reactive nature that only seven francium atoms exist on the earth at any one time... i dont think were going to be seeing a video anytime soon.....
We study francium by cooling and trapping it in a magneto-optical trap, and then subjecting it to a variety of laser pulses. We trap francium by neutralizing on a piece of heated yttrium and injecting it into a magneto-optical trap (MOT). The MOT is formed at the intersection of six laser beams shining through a glass cell vacuum chamber and an anti-Hemlholtz magnetic field, as depicted in the above apparatus figure. We use the MOT because it allows us to trap the francium in vacuum with no substrate in a volume less than 1 mm wide. The MOT also cools the trapped francium to below 100 µK, reducing the Doppler shift and broadening of spectroscopic lines to negligible levels. In 1995, the Francium Spectroscopy Group trapped 3,000 francium atoms in a MOT for the first time. In 2002, after redesigning and rebuilding the apparatus, the group succeeded in trapping francium with peak MOT populations of over 200,000 atoms, and an average MOT population of 50,000 atoms.
I believe Francium is the most reactive atom on the periodic table as mentioned by someone already. If you look at the reactivity series of metals, generally the reaction decreases as you go towards the right of the table towards the semimetals and the gases, and reactivity increases as you go downwards towards the heavier metals. So, Francium is a group one metal and at the very bottom, theoretical1y, it would be the most reactive. Its so reactive and dangerous that i think schools don't stock it.
It is the most reactive and most electronegative of all the elements..
Which would be the more reactive, francium or fluorine? They are diagonally opposite each other in the Periodic table (ignoring the noble gases) so , between themselves, are they not equally reactive?
You're going to bring potentials into this, soon, aren't you, Lightarrow?
1. 'cos it's the potential between atoms that makes them get together, vero?
2. 'cos you seem to like 'em.