UNDER RECONSTRUCTION BELOW
Caption: "Structural formula of the helium hydride ion." An ABSTRACT Lewis structure diagram molecule.
Features:
- Note, helium (He,Z=2) is a
noble gas and does NOT
form molecules, except under
extremely high pressure
(see Wikipedia: Helium compounds)
and under very unusual conditions in
in outer space
where its abundance is just a trace except perhaps in the
early observable universe
before the
recombination era t = 377,770(3200) Jyr
= 1.192*10**13 s (z = 1089.80(21))
(e.g., Stephen Lepp, 2019
"Discovery of the first molecular ion in the Universe".
????
helium hydride ion (HeH+
???
Helium (He)
is, of course,
the most abundant element after
hydrogen (H)
in molecular clouds,
but like molecular hydrogen (H_2),
it is nearly invisible: it has virtually NO emission
in the
thermodynamic state
of molecular clouds.
Image link: Wikimedia Commons: File:Carbon monoxide 2D.svg.
Local file: local link: molecule_HeH+.html.
File: Atomic file: molecule_HeH+.html.