Question

the bond energy of He2 molecule is taken to the next excited state then bond order of He2 is​

Answer 1

Answer:

In He2 molecule, Atomic orbitals available for making Molecular Orbitals are 1s from each Helium. And total number of electrons available are 4. It means 2 electrons are in bonding molecular orbitals and 2 are in antibonding molecular orbitals .

Explanation:

Molecule. Based on molecular orbital theory, He2 should not exist, and a chemical bond cannot form between the atoms. However, the van der Waals force exists between helium atoms as shown by the existence of liquid helium, and at a certain range of distances between atoms the attraction exceeds the repulsion.

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.

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