Why is He2 not a molecule?
According to molecular orbital theory He2 has 2 electrons in sigma 1s bonding and 2 in sigma 1s antibonding. So its bond order comes out to be 0 and a molecule must have a bond order of atleast 1 to exist thats why He2 doesnt exist.
What is the bond order for He2 molecule?
Bond order of He2 is zero.
Is He2 molecule is possible clarify it?
question_answer Answers(1) Thus there are equal number of electrons present in bondig molecular orbitals and anti-bonding molecular orbitals. Thus there are Zero (0) number of bonds present between He atoms in He2 molecule. Thus there is no existence of He2 (diatomic Helium)molecule.
Can helium be a molecule?
Helium hydride is a finicky molecule. Helium itself is a noble gas making it very unlikely to combine with any other kind of atom. But in 1925, scientists were able to create the molecule in a laboratory by coaxing the helium to share one of its electrons with a hydrogen ion.
Is He2 diamagnetic or paramagnetic?
Seeing the electronic configuration, there is one unpaired electron present in the antibonding orbital. Hence $ H{e_2}^ + $ is paramagnetic.
Is helium a dimer?
The helium dimer is a van der Waals molecule with formula He2 consisting of two helium atoms. This chemical is the largest diatomic molecule—a molecule consisting of two atoms bonded together. The bond that holds this dimer together is so weak that it will break if the molecule rotates, or vibrates too much.
Is Li2 paramagnetic or diamagnetic?
Li2 only has 2 electrons. If you draw the MO diagram, they should both be in the sigma 2s bonding orbital. They are both paired, so it is diamagnetic.
Why He2 does not exist but He2+ does?
Answer Expert Verified The molecular orbital configuration is based on the number of electrons. The number of electrons in is 4. When bond order is 0, such a molecule does not exist. The bond order is not equal to 0, hence this molecule exists.
Why helium molecule not exist explain on the basis of molecular orbital theory?
According to the molecular orbital theory He has two electrons in the outermost shell and thus it is chemically stable because it’s duplet is complete. Hence it does not participate in the bond formation and molecule must have a bond to exist which is not in case of Helium.
What is Argon molecule?
Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. The complete octet (eight electrons) in the outer atomic shell makes argon stable and resistant to bonding with other elements.
Is sodium a compound or molecule?
Sodium is a chemical element with the symbol Na (from Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table.
Why is He2+ a paramagnetic ion?
Also, in antibonding molecular orbitals, there is a node where electron density is zero. The bonding molecular orbitals are formed by the additive effect of the atomic orbitals. Seeing the electronic configuration, there is one unpaired electron present in the antibonding orbital. Hence $ H{e_2}^ + $ is paramagnetic.