Jump to content

molecules


fiveworlds

Recommended Posts

How do we distinguish between different molecules of the same element? Secondly what is the mass of tri-atomic hydrogen? Thirdly what is the bond length of tri-atomic hydrogen. Finally what is the effective strength of the nuclear force of the individual nucleons and the average nuclear bond length in femtometers.

Edited by fiveworlds
Link to comment
Share on other sites

As hyper says, allotropes are probably what you mean. You could look 'em up in Wikipedia.(Sulfur has some funny Allotropes!)

mass of H3? I don't think that's quite a stable molecule. It's collapse as fast as being generated.

Wiki says the range is ~0.7-2.5 fm. However 1 fm is the most powerful.

It's force depends on the nuclei involved, their distance and their number. This image will do it:

350px-Nuclear_force.png

Force (in units of 10,000 N) between two nucleons that experience the nuclear force, as a function of distance. In the graph that falls below the horizontal axis, the spins of the particles (which must be different, such as a neutron and proton) are aligned, and they become bound with a negative "binding energy," which becomes maximal at a distance a little more than 1 fm at the minimum of the region shown. Particles much closer than this optimal distance experience a repulsive force. Particles farther than the distance of highest attractive force still experience a smaller attractive potential (Yukawa potential), but it falls at an exponential function of distance.

 

 

Courtesy of Wikimedia Foundation Inc, reproduced here regarding Creative Commons Attribution-ShareAlike License;

Link to comment
Share on other sites

I cannot see H3 exist in any form. The elektrons of each H in H2 are already used to make the bond between them (a bonding orbital), leaving only an anti-bonding orbital. So even if a hydride (H-, thus with a fully filled 1s orbital, as you would need to get elektrons from somewhere) would interact with H2, the bond formed with either or both H2 hydrogens would end up in the anti-bonding orbital and thus be unstable (as in that it would exist for a neligible amount of time, not that the stuff would explode or be otherwise beneficial energy wise).

Link to comment
Share on other sites

Well, it does exist- but not for long.

http://en.wikipedia.org/wiki/Triatomic_hydrogen

As far as anyone would be able to measure it, it will have three times the mass of a single hydrogen. There would be a relativistic contribution from the bond energy, but it is tiny- too small to measure.

 

The questions about nuclear forces are in the wrong forum: they are not chemistry.

Link to comment
Share on other sites

How do we distinguish between different molecules of the same element?

 

They generally have different chemical properties. e.g. normal oxygen and ozone behave differently. Carbon has a fairly large number of different forms.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.