The Naked Scientists

The Naked Scientists Forum

Author Topic: How reactive is Francium?  (Read 42656 times)

Offline lightarrow

  • Neilep Level Member
  • ******
  • Posts: 4586
  • Thanked: 7 times
    • View Profile
How reactive is Francium?
« Reply #25 on: 28/11/2007 14:44:21 »
You're going to bring potentials into this, soon, aren't you, Lightarrow?
Why?
 

lyner

  • Guest
How reactive is Francium?
« Reply #26 on: 28/11/2007 16:18:00 »
1. 'cos it's the potential between atoms that makes them get together, vero?
2. 'cos you seem to like 'em.
 

Offline lightarrow

  • Neilep Level Member
  • ******
  • Posts: 4586
  • Thanked: 7 times
    • View Profile
How reactive is Francium?
« Reply #27 on: 28/11/2007 18:04:23 »
1. 'cos it's the potential between atoms that makes them get together, vero?
You should specify "makes them get together"; if you mean the binding energy in a ionic or covalent bond, it's not so simple because it also depends on  the charge, radius and reciprocal position of the ions, in the first case, and...too many things in the second  :).
Between Fluorine and chlorine, for example, the greater reactivity of F with hydrogen or some metals is essentially due to the fact fluorine atom is smaller than chlorine atom.

Another example is Al2O3: it's extremely stable, that is, very high (negative) ΔHformation, even if there are a lot of other metals with higher (in absolute value) reduction potential than Al: Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, U, Ce.
I don't know the exact reason of this, it's probably also due to the fact AL3+ ion is small, high charge and with a dimension that makes it pack very well with oxygen ions; the difficulty of this interpretation is also due to the fact that the bond is not exactly ionic... :)

Al reacts (at the proper temperature) with oxygen in a spectacular way; it's used for fireworks and some explosives indeed.
Quote
2. 'cos you seem to like 'em.
:)
« Last Edit: 28/11/2007 18:28:00 by lightarrow »
 

The Naked Scientists Forum

How reactive is Francium?
« Reply #27 on: 28/11/2007 18:04:23 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums