Triatomic hydrogen
Encyclopedia
Triatomic hydrogen or H3 is an unstable molecule composed of three atoms of hydrogen
.
The neutral molecule can be formed in a low pressure gas discharge tube.
It can break up in the following ways:
The molecule can only exist in an excited state. Examples of these states are: 2sA1' 3sA1' 2pA2" 3dE' 3DE" 3dA1' 3pE' 3pA2". The 2p2A2" state has a lifetime of 700 ns. If the molecule attempts to lose energy and go to the repulsive ground state, it spontaneously breaks up. The lowest energy metastable state, 2sA1' has an energy -3.777 eV below the H3+ and e- state but decays in around 1 ps
.
The most stable state is a Trihydrogen cation with an electron delocalized around it.
Hydrogen
Hydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly...
.
The neutral molecule can be formed in a low pressure gas discharge tube.
It can break up in the following ways:
The molecule can only exist in an excited state. Examples of these states are: 2sA1' 3sA1' 2pA2" 3dE' 3DE" 3dA1' 3pE' 3pA2". The 2p2A2" state has a lifetime of 700 ns. If the molecule attempts to lose energy and go to the repulsive ground state, it spontaneously breaks up. The lowest energy metastable state, 2sA1' has an energy -3.777 eV below the H3+ and e- state but decays in around 1 ps
Picosecond
A picosecond is 10−12 of a second. That is one trillionth, or one millionth of one millionth of a second, or 0.000 000 000 001 seconds. A picosecond is to one second as one second is to 31,700 years....
.
The most stable state is a Trihydrogen cation with an electron delocalized around it.
External links
- C. H. Green: "Rydberg states of Triatomic Hydrogen"